Present Simple

Respuesta correcta: B) travels

• A) travelThe base form is used with I, you, we and they.
• B) travelsThird person singular takes -s in the present simple.
• C) is travelAn auxiliary and a bare verb cannot be combined this way.
• D) travelingThe gerund alone cannot function as the verb of the clause.

Respuesta correcta: C) A permanent scientific fact

• A) An action happening right nowThat would require the present continuous.
• B) A finished action in the pastThat would require the simple past.
• C) A permanent scientific factGeneral truths are always expressed in the present simple.
• D) A probable future eventThat would require 'will' or a modal verb.

Respuesta correcta: B) Does

• A) Do'Do' goes with I, you, we and they, but 'your sister' is singular here.
• B) Does'Does' plus subject plus base verb is the correct interrogative.
• C) Is'Is' cannot open a question with the main verb 'work'.
• D) Does your sister worksAfter 'does' the verb must remain in the base form.

Respuesta correcta: C) wear

• A) wearsThe -s ending belongs to he, she or it.
• B) are wearTwo verb forms cannot be stacked in that order.
• C) wearA plural subject takes the base form in the present simple.
• D) were wearingThe past continuous refers to a past situation in progress.

Respuesta correcta: A) One is a habit and the other an action now

• A) One is a habit and the other an action nowTime reference, not grammar, separates the two forms.
• B) Both describe the same momentThey differ precisely in their time reference.
• C) The second is ungrammaticalBoth forms are grammatical in their own contexts.
• D) The first describes a future eventThe simple present describes habits and general truths.

Respuesta correcta: D) 'Do not' must be 'does not'

• A) Nothing is wrong with the sentenceThe auxiliary agreement is wrong in this sentence.
• B) 'Spicy' must be 'spicier'The adjective is correct in this sentence.
• C) 'Like' must be 'likes'After 'does not' the verb stays in the base form.
• D) 'Do not' must be 'does not'The auxiliary must agree with the third person singular subject.

Respuesta correcta: A) leaves

• A) leaves'It leaves' agrees with the singular subject 'it'.
• B) leaveA plural or second person subject would take the base form.
• C) is leavingThat would mean the train is leaving at this moment.
• D) leavingA gerund alone cannot answer the question.

Respuesta correcta: C) The market opens every Sunday at six.

• A) The market is opening every Sunday at six.The present continuous with 'every' describes a temporary arrangement.
• B) The market opened every Sunday at six.The simple past is incompatible with a habit that still holds.
• C) The market opens every Sunday at six.'Every Sunday' marks a recurring habit, so the present simple is required.
• D) The market will open every Sunday at six.'Will' points to the future, not to a standing schedule.

Respuesta correcta: B) He does not need a visa for that trip.

• A) He do not need a visa for that trip.The auxiliary must agree with 'he', which is 'does'.
• B) He does not need a visa for that trip.'Does not' plus base verb is the correct negative structure.
• C) He not needs a visa for that trip.The auxiliary must precede the adverb 'not'.
• D) He does not needs a visa for that trip.After 'does not' the verb returns to the base form 'need'.

Respuesta correcta: A) It is the simple past, used for a historical statement

• A) It is the simple past, used for a historical statementThe verb 'covered' is the simple past form, as history requires.
• B) It is the present simple describing a current factThe empire no longer exists, so the tense is not present.
• C) It is the present perfect'Covered' is not a participle; the form would be 'has covered'.
• D) It is the past continuousThere is no auxiliary to build a continuous form here.

Respuesta correcta: A) attracts

• A) attracts'Machu Picchu attracts' agrees with the singular subject.
• B) attractThe base form does not agree with a singular third person subject.
• C) is attractAn auxiliary plus a bare verb is not a valid combination.
• D) attractingA gerund cannot serve as the verb of a declarative sentence.

Respuesta correcta: D) go

• A) goesThe -s ending belongs to he, she or it.
• B) are goAn auxiliary plus a bare verb is not a valid combination.
• C) goingA gerund alone cannot function as the verb of the clause.
• D) goA plural subject takes the base form 'go' in the present simple.

Respuesta correcta: B) We do not have a gym at school.

• A) We does not have a gym at school.'Does' is the third person singular auxiliary.
• B) We do not have a gym at school.'Do not' plus base verb agrees with the plural subject 'we'.
• C) We do not has a gym at school.After 'do not' the verb must be the base form 'have'.
• D) We not do have a gym at school.The auxiliary must precede the adverb 'not'.

Respuesta correcta: C) Rosa works in a clinic helping elderly patients

• A) Rosa studies medicine at the universityThe text mentions a clinic, not a university.
• B) Elderly patients live near the clinicThe text says nothing about where patients live.
• C) Rosa works in a clinic helping elderly patientsBoth sentences describe the same routine.
• D) Rosa works only in the afternoonsThe text says every morning, not afternoons.

Respuesta correcta: D) The Amazon river flows through two countries.

• A) The Amazon river flowing through two countries.There is no finite verb: 'flowing' cannot close the clause.
• B) The Amazon river is flow through two countries.'Flow' is not a progressive form; use 'flows'.
• C) The Amazon river flows the most of two countries.'Most' does not belong in this statement about extent.
• D) The Amazon river flows through two countries.Correct agreement plus a general geographical fact.

Respuesta correcta: B) It indicates a permanent habit, which fits the present simple

• A) It indicates an action in progressThat is the function of 'at the moment' with the continuous form.
• B) It indicates a permanent habit, which fits the present simpleFrequency adverbs of this kind normally accompany the simple present.
• C) It indicates a finished past actionFrequency adverbs do not fix a past time.
• D) It indicates a future intention'Always' is not a marker of future time.

Respuesta correcta: D) does

• A) do'Do' does not agree with the singular subject 'the library'.
• B) is'Is' cannot be followed by the main verb 'open' in this structure.
• C) does it opensAfter 'does' the verb must stay in the base form 'open'.
• D) does'Does' plus subject plus base verb forms the question correctly.

Respuesta correcta: A) My parents wants to visit Machu Picchu.

• A) My parents wants to visit Machu Picchu.A plural subject requires the base form 'want', not 'wants'.
• B) My parents want to visit Machu Picchu.The plural subject correctly takes the base form.
• C) My parent wants to visit Machu Picchu.The singular subject correctly takes 'wants'.
• D) My parents are wanting to visit Machu Picchu.That form is not used in the present simple in standard English.

Respuesta correcta: C) leaves

• A) leaveThe base form does not agree with the singular subject.
• B) is leavingThe present continuous would suggest a single trip in progress.
• C) leavesA singular subject with habitual frequency takes the -s form.
• D) leftThe simple past would suggest the service has ended.

Respuesta correcta: D) 'Always' is absolute; 'usually' allows exceptions

• A) Both mean 'never'Neither adverb expresses zero frequency.
• B) 'Usually' refers to the pastBoth are frequency adverbs without a specific time reference.
• C) 'Always' refers to the futureNeither adverb fixes the time of the action.
• D) 'Always' is absolute; 'usually' allows exceptionsThe two adverbs sit at different points on the frequency scale.