Conditionals 0 1

Respuesta correcta: A) have

• A) haveThe 'if' clause takes the present simple for a real future condition, so 'have' is correct.
• B) will have'Will have' in the 'if' clause would make the condition sound less natural and less standard.
• C) had'Had' is the past form and belongs to the third conditional, not to the first.
• D) having'Having' is the -ing form, which cannot open an 'if' clause of the first conditional.

Respuesta correcta: B) will turn

• A) turns'Turns' is the present simple, which belongs in the 'if' clause rather than in the consequence.
• B) will turn'Will turn' is the consequence clause of the first conditional.
• C) turned'Turned' is the past simple and would describe a completed past event.
• D) would turn'Would turn' belongs to the second conditional, used for unreal or hypothetical situations.

Respuesta correcta: C) An imaginary or unlikely situation

• A) A real and probable future conditionThat is the first conditional, which uses the present simple in the 'if' clause.
• B) A past action that did not happenThat is the third conditional, which uses 'had' plus the past participle.
• C) An imaginary or unlikely situation'If' plus past simple with 'would' presents a situation that is not expected to happen.
• D) A habit in the pastA past habit would use the past simple alone, with no 'would'.

Respuesta correcta: D) If I lived abroad, I would speak two languages.

• A) If I will live abroad, I speak two languages.'Will' in the 'if' clause and the present simple in the main clause do not form the second conditional.
• B) If I lived abroad, I will speak two languages.Mixing past simple in the 'if' clause with 'will' in the main clause breaks the second conditional.
• C) If I would live abroad, I spoke two languages.'Would' cannot open the 'if' clause and the past simple in the main clause does not match it.
• D) If I lived abroad, I would speak two languages.'Lived' in the 'if' clause and 'would speak' in the main clause form the second conditional.

Respuesta correcta: D) Would

• A) Will'Will' opens a first conditional question, which would be 'Will you help me if I ask you?'.
• B) Did'Did' opens a past simple question and needs the base form 'help' after it.
• C) Do'Do' opens a present simple question and requires the base form 'help'.
• D) Would'Would' opens the question and matches the second conditional structure of the sentence.

Respuesta correcta: C) If you heat water to 100 degrees, it boils.

• A) If you would heat water to 100 degrees, it boiled.'Would' and the past simple create a second and a past form that do not express a general truth.
• B) If you heat water to 100 degrees, it will boiled.'Will' must be followed by the base form, so 'will boiled' is ungrammatical.
• C) If you heat water to 100 degrees, it boils.Both clauses use the present simple for a general truth, which is the zero conditional.
• D) If you heated water to 100 degrees, it will boil.Mixing past simple with 'will' breaks the zero conditional, which needs present simple twice.

Respuesta correcta: B) were

• A) was'Was' is the usual past form of 'be' but not the one the second conditional uses for 'I'.
• B) wereThe second conditional uses 'were' for all subjects, so 'If I were you' is the standard expression.
• C) am'Am' is the present form of 'be' and does not belong in a second conditional clause.
• D) will be'Will be' is a future form and cannot open the 'if' clause of a second conditional.

Respuesta correcta: A) will melt

• A) will melt'Will melt' pairs with the present simple condition to express a real future result.
• B) would melt'Would melt' would make the result hypothetical, which is not what the sentence states.
• C) melted'Melted' is the past simple and describes a finished action rather than a future result.
• D) melts'Melts' belongs in the condition clause, not in the result clause of the first conditional.

Respuesta correcta: B) If I had studied, I would have passed.

• A) If I would study, I passed.'Would' cannot open an 'if' clause and the past simple in the main clause is inconsistent.
• B) If I had studied, I would have passed.'Had studied' and 'would have passed' are the two halves of the third conditional.
• C) If I had studied, I would pass.The main clause needs 'would have' plus the past participle, not 'would' plus base form.
• D) If I studied, I would have passed.The 'if' clause of the third conditional needs 'had' plus the past participle.

Respuesta correcta: D) dies

• A) will die'Will die' belongs to the first conditional, which is used for one particular real situation.
• B) would die'Would die' would make the result hypothetical, which the sentence does not suggest.
• C) died'Died' is the past simple and describes a finished past event.
• D) diesZero conditional conditionals join two present simple clauses for facts that always hold.

Respuesta correcta: C) would work

• A) will work'Will work' is the future simple and cannot follow an unreal past condition.
• B) worked'Worked' is the past simple and would make the result part of the unreal past.
• C) would work'Would work' gives the present result of an unreal past condition.
• D) have worked'Have worked' is the present perfect, which links the past to the present, not to a hypothetical.

Respuesta correcta: A) had

• A) had'If I had a car' is the standard second conditional condition for an unreal situation.
• B) have'Have' is the present simple and would give a first conditional instead.
• C) will have'Will have' belongs to a future time clause, not to a second conditional condition.
• D) would have'Would have' cannot open the 'if' clause of a conditional sentence.

Respuesta correcta: D) If you mix blue and yellow, you get green.

• A) If you would mix blue and yellow, you got green.'Would' and the past simple would make the sentence hypothetical rather than general.
• B) If you had mixed blue and yellow, you would have got green.That is the third conditional, which describes an unreal situation in the past.
• C) If you mix blue and yellow, you will got green.'Will' must be followed by the base form 'get', so 'will got' is ungrammatical.
• D) If you mix blue and yellow, you get green.Both clauses are present simple and state a general fact about colours.

Respuesta correcta: B) will go

• A) go'Go' alone is the present simple and would leave the sentence without a future result.
• B) will go'Unless it rains' is a negative condition, and 'will go' is its future consequence.
• C) would go'Would go' would present the beach trip as hypothetical rather than planned.
• D) went'Went' is the past simple and cannot describe a plan for the coming weekend.

Respuesta correcta: A) expands

• A) expands'Expands' is present simple and completes the zero conditional with the condition clause.
• B) will expand'Will expand' would belong to the first conditional, used for one particular situation.
• C) would expand'Would expand' would make the result hypothetical, which the fact does not require.
• D) expanded'Expanded' is the past simple and describes a single finished experiment.

Respuesta correcta: C) would take

• A) will take'Will take' is the future simple and would belong to a first conditional sentence.
• B) took'Took' is the past simple and cannot complete a second conditional sentence.
• C) would take'Would take' is the main clause of the second conditional that starts with 'If I were you'.
• D) would took'Would' must be followed by the base form 'take', never by the past form.

Respuesta correcta: B) will miss

• A) would miss'Would miss' would present the consequence as hypothetical rather than real.
• B) will miss'Will miss' is the future simple result of the first conditional condition.
• C) missed'Missed' is the past simple and would state that the bus was already missed.
• D) will missed'Will' must be followed by the base form 'miss', not by the past form 'missed'.

Respuesta correcta: A) would

• A) would'Would you travel' inverts the auxiliary to form the second conditional question.
• B) will'Will' would create a first conditional question, which requires 'if you win the prize'.
• C) did'Did' would create a past simple question needing the base form 'travel'.
• D) do'Do' would create a present simple question, which does not match 'if you won'.

Respuesta correcta: C) If she had called, I would have helped her.

• A) If she would call, I would have helped her.'Would' cannot open the 'if' clause, and the main clause alone cannot carry the whole conditional.
• B) If she had called, I would help her.The main clause of the third conditional needs 'would have' plus the participle, not 'would'.
• C) If she had called, I would have helped her.'Had called' and 'would have helped' are the two standard halves of the third conditional.
• D) If she called, I would have helped her.The 'if' clause of the third conditional needs 'had' plus the past participle.

Respuesta correcta: D) It introduces a condition.

• A) It introduces a reason.A reason is normally expressed with 'because', not with 'if'.
• B) It introduces a contrast.A contrast uses 'although', 'though' or 'but', which signal opposition rather than a condition.
• C) It introduces a comparison.Comparisons use 'like', 'as' or 'than', none of which appear in this sentence.
• D) It introduces a condition.'If' sets the situation that has to be true for the main clause to happen.