An unreal situation in the past with a past result.
If I had studied harder, I ___ my exams.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)would have passed
💡 Explicación
The third conditional describes a past situation that did not happen. If plus had plus participle, and would have plus participle in the result.
Ver respuesta
Respuesta correcta: A)would have passed
A)would have passedCorrect! The third conditional pairs a past perfect condition with would have plus participle.
B)would passA would without have belongs to the second conditional, which imagines the present rather than the past.
C)will passA future form cannot appear in a conditional that looks back at an unreal past.
D)had passedA past perfect in the result would reverse the two events, putting the passing before the studying.
💡 Explicación
The third conditional describes a past situation that did not happen. If plus had plus participle, and would have plus participle in the result.
Pregunta 2
Pregunta 2 · D3Bloom: Apply
The negative form of an unreal past condition.
If you ___ me, I would have helped you.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)had told
💡 Explicación
Negation in a third conditional is simply had plus not in the if clause. The result clause keeps would have plus participle unchanged.
Ver respuesta
Respuesta correcta: B)had told
A)toldThe past simple after if would build a second conditional, which is set in the present.
B)had toldCorrect! A negative third conditional takes if plus had not plus participle.
C)would have toldThe conditional belongs in the main clause, where the speaker puts would have helped.
D)have toldThe present perfect cannot combine with would have in the result clause of a third conditional.
💡 Explicación
Negation in a third conditional is simply had plus not in the if clause. The result clause keeps would have plus participle unchanged.
Pregunta 3
Pregunta 3 · D3Bloom: Apply
The mixed conditional with a past cause and a present result.
If he had left home earlier, he ___ at the university now.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)would be studying
💡 Explicación
Each clause of a mixed conditional takes the tense of its own time. The cause is past and unreal, and the consequence is a present situation.
Ver respuesta
Respuesta correcta: C)would be studying
A)will be studyingA future continuous would project from a future point, but the result is explicitly now.
B)would have studiedThe extra have would place the studying in the past, which the adverb now denies.
C)would be studyingCorrect! A past perfect condition with a present continuous result is the standard mixed conditional.
D)had studiedA past perfect in the main clause would put the result before the condition.
💡 Explicación
Each clause of a mixed conditional takes the tense of its own time. The cause is past and unreal, and the consequence is a present situation.
Pregunta 4
Pregunta 4 · D4Bloom: Apply
The mixed conditional with a past cause and a future result.
If the government had acted earlier, the situation ___ better by now.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)would be
💡 Explicación
Would plus an adjective, verb or modal in the base form describes a present or future consequence. By now tells us which of the two it is.
Ver respuesta
Respuesta correcta: D)would be
A)would have beenThe extra have would place the state in the past, but by now points at the present.
B)will beA future form cannot belong to a conditional whose condition is in the past.
C)had beenA past perfect in the result would reverse the causal order of the two events.
D)would beCorrect! A would plus adjective in the present with a by now time reference completes the mixed pattern.
💡 Explicación
Would plus an adjective, verb or modal in the base form describes a present or future consequence. By now tells us which of the two it is.
Pregunta 5
Pregunta 5 · D3Bloom: Apply
Regretting something not said in the past.
If only I ___ harder, everything would be different.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)had studied
💡 Explicación
If only plus had plus participle is the strongest expression of regret about a past action. It is the emotional core of the third conditional.
Ver respuesta
Respuesta correcta: A)had studied
A)had studiedCorrect! If only plus a past perfect expresses regret about a past action.
B)had studied harder yesterdayThe adverb yesterday is unnecessary and weakens the unreal sense the structure depends on.
C)studiedA bare past simple would suggest the study actually happened, and if only contradicts that.
D)would studyThe conditional belongs in the second clause, which already carries would be.
💡 Explicación
If only plus had plus participle is the strongest expression of regret about a past action. It is the emotional core of the third conditional.
Pregunta 6
Pregunta 6 · D3Bloom: Apply
A third conditional in a question form.
___ you have told me, I would have prepared everything.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)Had
💡 Explicación
Formal English allows the auxiliary to move to the front and drops if: had you told me, would you have told me. The tense of the verb stays exactly the same.
Ver respuesta
Respuesta correcta: B)Had
A)HaveHave is the auxiliary of the present perfect and cannot open an inverted third conditional.
B)HadCorrect! In an inverted third conditional, if is omitted and the auxiliary had leads the clause.
C)WouldWould belongs in the result clause, and the result already carries would have prepared.
D)DidDid is the auxiliary of the past simple and cannot invert a third conditional clause.
💡 Explicación
Formal English allows the auxiliary to move to the front and drops if: had you told me, would you have told me. The tense of the verb stays exactly the same.
Pregunta 7
Pregunta 7 · D3Bloom: Apply
The present result of a real past action.
The students worked hard. ___ they had not worked hard, they would have failed.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)If
💡 Explicación
Both styles exist: the inverted formal one and the if at the front everyday one. The tense pattern is identical in each, and only the placement of the auxiliary differs.
Ver respuesta
Respuesta correcta: C)If
A)UnlessUnless here would need a positive form, and the sentence is already negative inside the clause.
B)HadHad would invert the clause and drop if, and that inversion is not what this sentence is doing.
C)IfCorrect! The third conditional keeps if at the start of its clause in this more common style.
D)AlthoughAlthough introduces a concession, not a condition, and cannot govern a counterfactual result.
💡 Explicación
Both styles exist: the inverted formal one and the if at the front everyday one. The tense pattern is identical in each, and only the placement of the auxiliary differs.
Pregunta 8
Pregunta 8 · D4Bloom: Analyze
The difference between an unreal past and an unreal present.
If I ___ taller, I would have played for the national team.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)were
💡 Explicación
The mixed conditional is very common with static personal qualities such as height, age or nationality. Because these do not change, the unreal condition sits in the present while the result is past.
Ver respuesta
Respuesta correcta: D)were
A)had beenHad been would make the height a past fact, but being tall is a present and permanent condition.
B)amA present form after if would build a zero conditional about a rule, which is not the sense here.
C)will beA future form cannot describe the person's actual height, which is already fixed.
D)wereCorrect! 'Were' is the second conditional form for an unreal present situation that explains a past result.
💡 Explicación
The mixed conditional is very common with static personal qualities such as height, age or nationality. Because these do not change, the unreal condition sits in the present while the result is past.
Pregunta 9
Pregunta 9 · D3Bloom: Apply
An unreal past situation with a negative result.
If we had booked earlier, we ___ any problem at all.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)would not have had
💡 Explicación
The third conditional result always has three parts: would, have, participle. Negating the result simply inserts not between would and have.
Ver respuesta
Respuesta correcta: A)would not have had
A)would not have hadCorrect! A negative third conditional result takes would not have plus participle.
B)would not haveThe have is required in a third conditional result, and leaving it out would build a different structure.
C)did not haveDid plus not is the negative past simple, which cannot appear in a counterfactual result clause.
D)had not hadA past perfect in the result would reverse the order of the two past events.
💡 Explicación
The third conditional result always has three parts: would, have, participle. Negating the result simply inserts not between would and have.
Pregunta 10
Pregunta 10 · D3Bloom: Apply
A second conditional used for advice and polite warnings.
If I were you, I ___ apologise to the teacher.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)would
💡 Explicación
If I were you is a set phrase for advice, and it always uses the second conditional. Substituting was with were is the formal and standard choice.
Ver respuesta
Respuesta correcta: B)would
A)willA future form would turn the advice into a prediction, which is not what If I were you expresses.
B)wouldCorrect! The second conditional in this fixed expression gives advice with would plus base verb.
C)hadHad would make it a third conditional and shift the whole situation into the past.
D)mustMust is too strong, because the expression offers advice rather than imposing a rule.
💡 Explicación
If I were you is a set phrase for advice, and it always uses the second conditional. Substituting was with were is the formal and standard choice.
Pregunta 11
Pregunta 11 · D4Bloom: Apply
The third conditional with an action by a named person.
If the doctor had arrived ten minutes earlier, she ___ have saved his life.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)would
💡 Explicación
The subject of the result clause never changes the tense. Only the presence of have marks a third conditional result, and it is always present.
Ver respuesta
Respuesta correcta: C)would
A)would saveA would without have belongs to the second conditional and would place the saving in the present.
B)will have savedA future perfect would look forward from a future point, and the ten minutes refers to the past.
C)wouldCorrect! A third conditional result takes would have plus participle regardless of the subject.
D)had savedA past perfect in the result would put the saving before the doctor's arrival, which is impossible.
💡 Explicación
The subject of the result clause never changes the tense. Only the presence of have marks a third conditional result, and it is always present.
Pregunta 12
Pregunta 12 · D3Bloom: Apply
A past situation that did happen, with a past consequence.
If you had worn a helmet, you ___ much less pain.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)would have had
💡 Explicación
When a third conditional result uses a noun instead of a verb, the verb have appears. I would have had a headache is the standard pattern.
Ver respuesta
Respuesta correcta: D)would have had
A)would have feltFelt would also be possible in a third conditional result, but the sentence uses the noun pain and needs the verb have.
B)had hadA past perfect in the result would reverse the order of the two events.
C)would haveThe participle is missing, and the structure would be incomplete without it.
D)would have hadCorrect! The third conditional result with the noun pain takes would have had.
💡 Explicación
When a third conditional result uses a noun instead of a verb, the verb have appears. I would have had a headache is the standard pattern.
Pregunta 13
Pregunta 13 · D3Bloom: Apply
An unreal situation in the present expressed in the negative.
If I ___ afraid of flying, I would visit more countries.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)weren't
💡 Explicación
The second conditional always uses were for the unreal condition, including in the negative and in the question form. Were is the fixed form of this structure.
Ver respuesta
Respuesta correcta: A)weren't
A)weren'tCorrect! A negative second conditional condition takes if plus were not plus base verb.
B)wasn'tWas is possible in informal English, but were is the standard form in a second conditional.
C)hadn't beenHad not been would place the fear in the past and build a third conditional.
D)am notA present negative after if would build a zero conditional about a rule, not an unreal personal situation.
💡 Explicación
The second conditional always uses were for the unreal condition, including in the negative and in the question form. Were is the fixed form of this structure.
Pregunta 14
Pregunta 14 · D3Bloom: Apply
A real past action, with the counterfactual introduced afterwards.
We arrived late. If we had set out earlier, we ___ on time.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)would have arrived
💡 Explicación
A first sentence stating what happened is often followed by a third conditional saying what would have happened otherwise. The contrast between the two makes the regret clear.
Ver respuesta
Respuesta correcta: B)would have arrived
A)would arriveA would without have would place the arrival in the present, contradicting the past that follows.
B)would have arrivedCorrect! The if clause imagines the earlier departure that did not happen, and the result is would have arrived.
C)had arrivedA past perfect in the result would put the arrival before the departure, which reverses the sequence.
D)will have arrivedA future perfect cannot be used in a conditional about the past.
💡 Explicación
A first sentence stating what happened is often followed by a third conditional saying what would have happened otherwise. The contrast between the two makes the regret clear.
Pregunta 15
Pregunta 15 · D4Bloom: Apply
The word that introduces an alternative in the past.
She studied abroad. Otherwise, she ___ the same degree in her own country.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)would have finished
💡 Explicación
Otherwise works like a negative conditional. The sentence it introduces carries the same counterfactual meaning and needs would have plus participle.
Ver respuesta
Respuesta correcta: C)would have finished
A)would finishA would without have would place the finishing in the present, and the degree is already in the past.
B)has finishedThe present perfect cannot combine with would in a counterfactual result clause.
C)would have finishedCorrect! Otherwise plus a third conditional result states what would otherwise have happened.
D)had finishedA past perfect alone would state a plain past fact, and the sentence is about a possibility that did not happen.
💡 Explicación
Otherwise works like a negative conditional. The sentence it introduces carries the same counterfactual meaning and needs would have plus participle.
Pregunta 16
Pregunta 16 · D3Bloom: Apply
A third conditional whose result is a permanent state.
If they had not emigrated, they ___ in their home town today.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)would still be living
💡 Explicación
The mixed conditional often ends in a present continuous, because the consequence of an old decision is a current situation. The adverb today confirms the present time.
Ver respuesta
Respuesta correcta: D)would still be living
A)would have been livingThe extra have would place the living in the past, and today points to the present.
B)will still be livingA future form cannot be the result of a conditional whose condition belongs to the past.
C)had been livingA past perfect in the result would reverse the order and place the living before the decision to emigrate.
D)would still be livingCorrect! A would plus continuous in the present gives the present consequence of an unreal past action.
💡 Explicación
The mixed conditional often ends in a present continuous, because the consequence of an old decision is a current situation. The adverb today confirms the present time.
Pregunta 17
Pregunta 17 · D3Bloom: Apply
A real first conditional used to check someone's understanding.
If you revise every evening, you ___ much better in the next exam.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)will do
💡 Explicación
Whenever a condition is real and open, the first conditional is the right choice. The advice in the question depends on that first conditional reading.
Ver respuesta
Respuesta correcta: A)will do
A)will doCorrect! A real condition in the present with a probable future result takes will plus base verb.
B)would do'Would' would make the result hypothetical, and the revision is a real plan.
C)didDid belongs to the past simple and cannot carry a future result.
D)doA bare present in both clauses would read as a zero conditional about a rule.
💡 Explicación
Whenever a condition is real and open, the first conditional is the right choice. The advice in the question depends on that first conditional reading.
Pregunta 18
Pregunta 18 · D4Bloom: Apply
A third conditional with a modal in the result.
If you had taken the medicine, you ___ better by morning.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)would have felt
💡 Explicación
In a third conditional result, a modal keeps its base form after the have: would have felt, would have been able to, would have had to. The have does not take the modal's participle.
Ver respuesta
Respuesta correcta: B)would have felt
A)would have feelFeel must be the base form after the modal would, not the participle feel.
B)would have feltCorrect! A third conditional result takes would have plus the base form of the modal and the participle.
C)would feelA would without have belongs to the second conditional and would place the recovery in the present.
D)will have feltA future perfect cannot serve as the result of a conditional about the past.
💡 Explicación
In a third conditional result, a modal keeps its base form after the have: would have felt, would have been able to, would have had to. The have does not take the modal's participle.
Pregunta 19
Pregunta 19 · D3Bloom: Apply
A second conditional question with inversion.
___ you in my place, what would you do?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)Were
💡 Explicación
Were you in my place is a common formal inversion of the second conditional. The tense of the main clause is untouched, and only the auxiliary moves to the front.
Ver respuesta
Respuesta correcta: C)Were
A)IfIf at the front of the clause is the ordinary style; this sentence uses the inverted form, which begins with were.
B)WouldWould cannot begin a second conditional condition, and the result clause already carries would do.
C)WereCorrect! In an inverted second conditional the auxiliary were leads the clause and if is dropped.
D)DidDid is the auxiliary of the past simple and cannot invert a second conditional clause.
💡 Explicación
Were you in my place is a common formal inversion of the second conditional. The tense of the main clause is untouched, and only the auxiliary moves to the front.
Pregunta 20
Pregunta 20 · D4Bloom: Apply
A third conditional introduced by a past modal that expresses regret.
If you ___ have taken the earlier bus, you would have arrived on time.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)had
💡 Explicación
A modal in a third conditional condition appears in the base form after had: if you had taken, if he had been able to. The have of the result clause is separate and stays with the participle.
Ver respuesta
Respuesta correcta: D)had
A)wouldWould would place the taking in a hypothetical present, and the earlier bus is already past.
B)haveA present perfect cannot invert a third conditional condition, and no had would carry the past.
C)didDid cannot invert a modal condition, and it leaves the modal without the support it needs.
D)hadCorrect! A third conditional condition built on a modal takes had plus the base form of the modal.
💡 Explicación
A modal in a third conditional condition appears in the base form after had: if you had taken, if he had been able to. The have of the result clause is separate and stays with the participle.
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