The zero conditional describes facts and results that are always true. It uses if plus present simple and present simple, with no future tense anywhere.
Ver respuesta
Respuesta correcta: A)get
A)getCorrect! The zero conditional states a general truth with the present simple in both clauses.
B)will getThe future simple in both clauses would turn a permanent truth into one particular future prediction.
C)would get'Would' belongs to the second conditional, which deals with unreal or imagined situations.
D)are gettingA present continuous would describe an action happening now, not a result that always follows.
💡 Explicación
The zero conditional describes facts and results that are always true. It uses if plus present simple and present simple, with no future tense anywhere.
Pregunta 2
Pregunta 2 · D2Bloom: Apply
A real and likely future condition.
If we leave now, we ___ the last bus.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)will catch
💡 Explicación
The first conditional is about real and possible futures. If plus present, will plus base verb, and the reality of the condition is what selects will over would.
Ver respuesta
Respuesta correcta: B)will catch
A)would catch'Would' is the second conditional and marks the result as less certain or more hypothetical.
B)will catchCorrect! The first conditional pairs a present condition with a probable future result.
C)catchA bare present in both clauses would read as a zero conditional about a rule, not a prediction.
D)have caughtThe present perfect would place the catching in a period that ends at now, which is not the future being described.
💡 Explicación
The first conditional is about real and possible futures. If plus present, will plus base verb, and the reality of the condition is what selects will over would.
Pregunta 3
Pregunta 3 · D3Bloom: Apply
An imagined present situation that is probably not true.
If I ___ more time, I would learn another language.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)had
💡 Explicación
The second conditional imagines the present as different from what it is. The if clause takes the past simple and the main clause takes would plus base verb.
Ver respuesta
Respuesta correcta: C)had
A)haveA present simple after if would build a zero conditional about a rule, not an unreal situation.
B)would haveThe past perfect belongs to the third conditional, which looks back from a past moment.
C)hadCorrect! The second conditional uses if plus past simple for an unreal present condition.
D)was havingA past continuous would suggest a duration rather than the single unreal condition the sentence imagines.
💡 Explicación
The second conditional imagines the present as different from what it is. The if clause takes the past simple and the main clause takes would plus base verb.
Pregunta 4
Pregunta 4 · D2Bloom: Apply
Give advice about a present situation.
You look tired. You ___ go to bed earlier.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)should
💡 Explicación
Should, ought to and had better all give advice in the present. Should is the most neutral of the three and is the usual answer to an offer of advice.
Ver respuesta
Respuesta correcta: D)should
A)couldCould suggests a possibility, and the sentence is a recommendation rather than a hint about what might happen.
B)mustMust expresses obligation or a deduction, which is stronger than the advice being offered.
C)willA future form would make a statement about what will happen, not advice about what to do.
D)shouldCorrect! Should is the modal used to give advice about what someone ought to do.
💡 Explicación
Should, ought to and had better all give advice in the present. Should is the most neutral of the three and is the usual answer to an offer of advice.
Pregunta 5
Pregunta 5 · D3Bloom: Apply
An obligation that is not negotiable.
All applicants ___ submit their documents before the deadline.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)must
💡 Explicación
Must, have to and need are the strong obligation modals. In formal written rules, must is the standard choice because it does not depend on the speaker's estimate of necessity.
Ver respuesta
Respuesta correcta: A)must
A)mustCorrect! Must expresses a strong obligation, which is what the rule imposes.
B)shouldShould gives advice, and an official requirement is stronger than advice.
C)couldCould expresses possibility or ability and suggests the opposite of a requirement.
D)mightMight expresses a small possibility and would weaken a strict rule to a guess.
💡 Explicación
Must, have to and need are the strong obligation modals. In formal written rules, must is the standard choice because it does not depend on the speaker's estimate of necessity.
Pregunta 6
Pregunta 6 · D3Bloom: Apply
A request for permission.
___ I open the window? It is very hot in here.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)May
💡 Explicación
May I and can I are the two ways to ask permission. May is more formal and sounds more polite, while can is the everyday alternative.
Ver respuesta
Respuesta correcta: B)May
A)MustMust expresses obligation and has no use at all in a request for permission.
B)MayCorrect! May is the polite modal used to ask for permission in a formal register.
C)ShouldShould gives advice, and the speaker is asking whether something is allowed, not advising.
D)WillA future form cannot request permission, and will questions normally seek information.
💡 Explicación
May I and can I are the two ways to ask permission. May is more formal and sounds more polite, while can is the everyday alternative.
Pregunta 7
Pregunta 7 · D3Bloom: Apply
The future time clause inside a conditional.
If you ___ early, you will miss the ceremony.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)arrive
💡 Explicación
In the first and second conditionals the if clause stays in the present or the past. The future tense lives only in the main clause, which is why no will appears twice.
Ver respuesta
Respuesta correcta: C)arrive
A)will arriveThis is the standard error: a future form inside a conditional clause that refers to the future.
B)would arrive'Would' would place the arrival in an imagined situation, and the sentence is a plain warning.
C)arriveCorrect! A future time clause takes the present simple, with the future in the main clause.
D)arrivedThe past simple would suggest the arrival had already happened, which the future warning denies.
💡 Explicación
In the first and second conditionals the if clause stays in the present or the past. The future tense lives only in the main clause, which is why no will appears twice.
Pregunta 8
Pregunta 8 · D3Bloom: Apply
The negative form of a real condition.
If you ___ your keys, you cannot get into the flat.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)lose
💡 Explicación
Negation usually goes in the main clause of a first conditional. The if clause then simply describes a real condition with the present simple.
Ver respuesta
Respuesta correcta: D)lose
A)will loseA future form in the if clause is not used when the clause refers to the future or the present.
B)lostThe past simple would make the condition a one-off past event, and the result is stated in the present.
C)would lose'Would' would turn the condition into an unreal or doubtful situation, which the plain warning denies.
D)loseCorrect! A real general condition takes the present simple, and the negative is in the main clause.
💡 Explicación
Negation usually goes in the main clause of a first conditional. The if clause then simply describes a real condition with the present simple.
Pregunta 9
Pregunta 9 · D4Bloom: Apply
An invitation or a polite suggestion in the present.
___ like to join us for coffee after class?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)Would
💡 Explicación
Would you like to plus base verb is the everyday polite invitation. Shall I is used when the speaker is the one offering to do the action.
Ver respuesta
Respuesta correcta: A)Would
A)WouldCorrect! Would you like to is the standard polite invitation in English.
B)DoDo cannot be followed by like to, and the form of the verb is not the issue here.
C)AreA form of be would need a different structure, and it does not produce a polite invitation.
D)MustMust expresses obligation and cannot be used to invite someone anywhere.
💡 Explicación
Would you like to plus base verb is the everyday polite invitation. Shall I is used when the speaker is the one offering to do the action.
Pregunta 10
Pregunta 10 · D3Bloom: Apply
A deduction from present evidence.
The ground is wet and her umbrella is dripping. She ___ have just come back.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)must
💡 Explicación
Modal verbs for deduction differ in strength: must for certain, may or might for possibility, cannot for certainty that something is not the case. The wet ground is the evidence here.
Ver respuesta
Respuesta correcta: B)must
A)mightMight expresses a possibility and is much weaker than the evidence supports.
B)mustCorrect! Must expresses a deduction drawn from strong present evidence.
C)shouldShould expresses an expectation or advice and is not used for a firm deduction.
D)canCan expresses ability or general possibility and says nothing about what has just happened.
💡 Explicación
Modal verbs for deduction differ in strength: must for certain, may or might for possibility, cannot for certainty that something is not the case. The wet ground is the evidence here.
Pregunta 11
Pregunta 11 · D3Bloom: Apply
A deduction about a situation in the past.
She was out all night and arrived exhausted. She ___ have been studying.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)must
💡 Explicación
A deduction about the past uses must, may or cannot followed by have plus the past participle. The structure is the same as the present one with an extra have.
Ver respuesta
Respuesta correcta: C)must
A)must be studyingA present participle would put the studying now, but the whole scene is in the past.
B)should be studiedThat is a passive form and would mean the studying itself is being studied.
C)mustCorrect! Must plus have plus participle expresses a deduction about the past.
D)can have beenCan does not carry a past deduction with the strength the evidence provides here.
💡 Explicación
A deduction about the past uses must, may or cannot followed by have plus the past participle. The structure is the same as the present one with an extra have.
Pregunta 12
Pregunta 12 · D3Bloom: Apply
The negative question asking for information about a routine.
___ you usually walk to school?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)Do
💡 Explicación
The auxiliary in a simple question follows the subject. With you the auxiliary is do, and the main verb returns to its base form: do you walk.
Ver respuesta
Respuesta correcta: D)Do
A)AreAre builds the present continuous, which would ask about a temporary action rather than a routine.
B)DoesDoes builds the third person singular, but the subject you requires do.
C)DidDid belongs to the past simple and the question is about a present habit.
D)DoCorrect! Questions in the present simple take do as the auxiliary, with the subject after it.
💡 Explicación
The auxiliary in a simple question follows the subject. With you the auxiliary is do, and the main verb returns to its base form: do you walk.
Pregunta 13
Pregunta 13 · D4Bloom: Apply
An impossibility expressed with a modal.
I'm sorry, I ___ come to the meeting. I have a dentist appointment.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)can't
💡 Explicación
Cannot and can't report a real limitation. Needn't and must not both concern necessity and obligation, which is a different relationship to the action.
Ver respuesta
Respuesta correcta: A)can't
A)can'tCorrect! Can't expresses the inability that the appointment explains.
B)mustn'tMustn't expresses a prohibition, as in you mustn't smoke, and not an inability of the speaker.
C)needn'tNeedn't says something is not necessary, which is weaker than saying attendance is impossible.
D)shouldn'tShouldn't gives advice about what is unwise, and the real obstacle is the appointment.
💡 Explicación
Cannot and can't report a real limitation. Needn't and must not both concern necessity and obligation, which is a different relationship to the action.
Pregunta 14
Pregunta 14 · D3Bloom: Apply
The past form of a modal in an indirect question.
He asked me ___ I had finished the report.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)if
💡 Explicación
When a yes or no question is reported, whether or if replaces the question word and the subject comes before the auxiliary: he asked me if I had finished.
Ver respuesta
Respuesta correcta: B)if
A)thatThat cannot introduce a yes or no question, and the question reported here expects an answer.
B)ifCorrect! In a reported question the word order is inverted, so if replaces whether and the auxiliary follows the subject.
C)whichWhich asks about a choice between options, and there is no choice being offered here.
D)whatWhat asks about a thing or a cause, and the question here is a simple polar question.
💡 Explicación
When a yes or no question is reported, whether or if replaces the question word and the subject comes before the auxiliary: he asked me if I had finished.
Pregunta 15
Pregunta 15 · D3Bloom: Apply
The third conditional, with a regret about the past.
If we had left earlier, we ___ the flight.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)would have caught
💡 Explicación
The third conditional describes an unreal past situation. If plus had plus participle, and would have plus participle in the result.
Ver respuesta
Respuesta correcta: C)would have caught
A)would catchA would without have belongs to the second conditional, which is set in the present.
B)will catchA future form cannot be used in a third conditional, because the whole situation belongs to the past.
C)would have caughtCorrect! The third conditional pairs a past perfect condition with would have plus participle.
D)had caughtA past perfect in the main clause would place the catching before the leaving, which is the wrong order.
💡 Explicación
The third conditional describes an unreal past situation. If plus had plus participle, and would have plus participle in the result.
Pregunta 16
Pregunta 16 · D4Bloom: Apply
A condition in the past without the usual unreal sense.
If you had asked me yesterday, I ___ have told you the truth.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)would
💡 Explicación
Once the if clause is in the past perfect, the main clause must also be past, and would plus have plus participle is the only available form for the result.
Ver respuesta
Respuesta correcta: D)would
A)willA future form cannot belong to a conditional about two past events.
B)doDo builds the present simple or the present continuous, neither of which fits a past condition.
C)mustMust would express a deduction, not the hypothetical result the sentence imagines.
D)wouldCorrect! The third conditional is the only structure that fits a past condition and a past result.
💡 Explicación
Once the if clause is in the past perfect, the main clause must also be past, and would plus have plus participle is the only available form for the result.
Pregunta 17
Pregunta 17 · D3Bloom: Apply
The mixed conditional about a past cause and a present result.
If she had studied medicine, she ___ in a hospital now.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)would be working
💡 Explicación
The mixed conditional links an unreal past cause to a present or future result. The time of each clause is decided independently, which is what makes it mixed.
Ver respuesta
Respuesta correcta: A)would be working
A)would be workingCorrect! The mixed conditional takes a past perfect condition and a present result.
B)will be workingA future continuous would predict a result from a future point, and the condition is in the past.
C)would have been workingThe extra have would place the working in the past as well, but the result is explicitly now.
D)had been workingA past perfect in the main clause would reverse the order and put the result before the condition.
💡 Explicación
The mixed conditional links an unreal past cause to a present or future result. The time of each clause is decided independently, which is what makes it mixed.
Pregunta 18
Pregunta 18 · D3Bloom: Apply
The question form of a first conditional.
What ___ you do if the bus does not come?
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)will
💡 Explicación
A wh question in a first conditional follows what plus will plus subject plus base verb. The if clause inside it keeps its present simple.
Ver respuesta
Respuesta correcta: B)will
A)would'Would' would build a second or third conditional, and the question describes a real future possibility.
B)willCorrect! A first conditional question puts will in the auxiliary position and leaves the main verb in the base form.
C)doDo builds the present simple and has no place in a future conditional question.
D)didDid belongs to the past simple and cannot carry a future result.
💡 Explicación
A wh question in a first conditional follows what plus will plus subject plus base verb. The if clause inside it keeps its present simple.
Pregunta 19
Pregunta 19 · D3Bloom: Apply
A proposal or a suggestion for the future.
Let's take a taxi. It ___ rain in ten minutes.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)will
💡 Explicación
The let's in the first clause signals a decision taken now, and that same decisiveness carries over into the prediction. Will is the form for judgements made at the moment of speaking.
Ver respuesta
Respuesta correcta: C)will
A)would'Would' belongs to conditionals and to polite offers, not to a plain weather prediction.
B)is going toBe going to needs prior evidence or intention, and the statement is an immediate forecast.
C)willCorrect! A prediction made at the moment of speaking is expressed with will.
D)shallShall is used mainly in offers and suggestions with I or we, not for predicting rain.
💡 Explicación
The let's in the first clause signals a decision taken now, and that same decisiveness carries over into the prediction. Will is the form for judgements made at the moment of speaking.
Pregunta 20
Pregunta 20 · D4Bloom: Apply
A condition stated with unless, which means the same as if plus not.
You will fail the exam ___ you revise.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)unless
💡 Explicación
Unless plus the positive form equals if plus not plus the same verb. You will fail unless you revise says exactly what if you do not revise, you will fail says.
Ver respuesta
Respuesta correcta: D)unless
A)ifIf here would be wrong, because if you revise reverses the meaning and contradicts the result.
B)althoughAlthough introduces a contrast, not a condition, and it cannot govern this result clause.
C)thatThat introduces a noun clause or a result, and it cannot express a condition.
D)unlessCorrect! Unless replaces if plus not and takes the same verb form as the if clause would have.
💡 Explicación
Unless plus the positive form equals if plus not plus the same verb. You will fail unless you revise says exactly what if you do not revise, you will fail says.
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