Present Simple

Respuesta correcta: D) She works at a pharmacy on Saturdays.

• A) She work at a pharmacy on Saturdays.Missing the third person singular -s: it would have to be 'She works'.
• B) She working at a pharmacy on Saturdays.Without an auxiliary, the -ing form cannot be the main verb: it would need 'She is working', which is not the present simple.
• C) She is work at a pharmacy on Saturdays.Mixing two present forms: the verb cannot be both 'is' and the bare 'work'.
• D) She works at a pharmacy on Saturdays.Third person singular takes -s in the present simple, so this form is correct.

Respuesta correcta: D) boils

• A) boilThe plural -s of the noun 'water' is not transferred to the verb; 'boils' is required.
• B) is boilingPresent continuous describes an action in progress right now, not a scientific constant.
• C) boiledSimple past refers to a completed action in the past, not to a permanent property.
• D) boilsIncontable subject + present simple: add -s, so 'water boils'.

Respuesta correcta: C) Does she live near the university?

• A) Do she live near the university?'Do' goes with I, you, we and they; with 'she' it must be 'Does'.
• B) Does she lives near the university?After 'does' the verb stays in the base form; adding -s would double the third person mark.
• C) Does she live near the university?'Does' takes the base form 'live' and carries the -s of the third person singular.
• D) Is she lives near the university?'Is' cannot open a question with a main verb like 'live' in the simple present.

Respuesta correcta: D) My brother does not play chess on Fridays.

• A) My brother do not play chess on Fridays.The auxiliary must agree with the subject; with 'brother' it must be 'does not'.
• B) My brother not play chess on Fridays.The negative needs a full auxiliary ('does not'), not a bare 'not' before the verb.
• C) My brother does not plays chess on Fridays.After 'does not' the verb returns to its base form: 'does not play'.
• D) My brother does not play chess on Fridays.'Does not' + base verb is the correct negative for the third person singular.

Respuesta correcta: A) speaks

• A) speaksThe subject is 'he', so the third person singular form 'speaks' is required.
• B) speakThe base form is used with I, you, we and they, but not with 'he'.
• C) is speakMixing an auxiliary with a bare verb: only one present form can carry the tense.
• D) speaking'Speaking' is a gerund or a present participle; it cannot be the only verb of the clause.

Respuesta correcta: C) visits

• A) is visitingPresent continuous would place the visits at this moment, not every Sunday.
• B) will visit'Will' describes a future action, but the routine is already established.
• C) visitsA repeated weekly habit belongs to the present simple with -s for 'Sofia'.
• D) has visitedPresent perfect would link the visits to a past result or to an unspecified time.

Respuesta correcta: B) are

• A) isReserved for the singular 'he/she/it' or for 'this/that'.
• B) arePlural subject plus present continuous marker 'right now': 'are'.
• C) amUsed only with the first person singular 'I'.
• D) beThe bare infinitive cannot function as the verb of a declarative sentence.

Respuesta correcta: C) The shop opens at eight every morning.

• A) The shop is opening at eight every morning.Present continuous with 'every morning' describes something temporary, not a fixed schedule.
• B) The shop opened at eight every morning.Simple past is incompatible with the repeated present habit 'every morning'.
• C) The shop opens at eight every morning.'Every morning' marks a habitual action, so the present simple is the right tense.
• D) The shop will open at eight every morning.'Will' refers to the future; the store schedule is already a fact.

Respuesta correcta: B) Present simple

• A) Present continuousPresent continuous would imply the fact is temporary or changing now.
• B) Present simplePermanent geographical facts are expressed in the present simple.
• C) Past simplePast simple would suggest the information is no longer valid.
• D) Present perfectPresent perfect usually connects past actions to a present result, not static facts.

Respuesta correcta: A) do

• A) doPlural subject uses 'do' with the base form 'do their homework'.
• B) does'Does' is reserved for he/she/it; with a plural subject it would be incorrect.
• C) are doMixing an auxiliary and a bare verb: only one form may carry the action.
• D) doingA gerund cannot stand alone as the verb of the sentence.

Respuesta correcta: D) The nurse watches over the patients at night.

• A) The nurses watches over the patients at night.Plural subject 'The nurses' requires the base form 'watch'.
• B) The nurse watch over the patients at night.Missing the -s of the third person singular.
• C) The nurses is watch over the patients at night.Combines the plural auxiliary 'are' idea with a bare verb; inconsistent.
• D) The nurse watches over the patients at night.'The nurse' is third person singular, so the verb takes -s.

Respuesta correcta: A) Traffic in the capital gets worse every rainy season.

• A) Traffic in the capital gets worse every rainy season.Correct subject-verb agreement plus a habitual time expression.
• B) Traffic in the capital getting worse every rainy season.There is no finite verb: 'getting' alone cannot close the clause.
• C) Traffic in the capital is get worse every rainy season.'Get worse' is not a progressive form; use 'gets worse'.
• D) Traffic in the capital get worst every rainy season.'Worst' is the superlative, not the comparative required by 'get worse'.

Respuesta correcta: B) There is no error: plural subject with the base verb 'live'.

• A) 'Live' should be 'lives' because the subject is plural.The rule is the opposite: plural subjects take the base form without -s.
• B) There is no error: plural subject with the base verb 'live'.The agreement 'friends ... live' is correct, so nothing has to be changed.
• C) 'Live' should be 'living' because the sentence describes a habit.Habits go in the present simple, not the present continuous.
• D) 'They' should be 'he' because one friend is mentioned.The plural 'friends' and the plural pronoun 'they' are coherent with each other.

Respuesta correcta: A) She walks to school.

• A) She walks to school.'Walks' is in the text and describes her way to school.
• B) She drives to school.The text says she walks; driving never appears.
• C) She has lunch at school.The text mentions breakfast at home, not lunch at school.
• D) She studies at night.No evening activity is described in the text.

Respuesta correcta: D) Water boils at one hundred degrees Celsius.

• A) Water boil at one hundred degrees Celsius.Missing the third person singular -s after 'boil'.
• B) Water do boil at one hundred degrees Celsius.'Do' is the auxiliary of the emphatic form, not of the plain affirmative.
• C) Water are boiling at one hundred degrees Celsius.Wrong auxiliary and wrong tense for a permanent physical fact.
• D) Water boils at one hundred degrees Celsius.Subject plus base verb in the present simple: no auxiliary is needed.

Respuesta correcta: B) The students arrive early every day.

• A) The students arriving early every day.Non-finite form: 'arriving' cannot be the verb of the sentence.
• B) The students arrive early every day.Habitual action in the present simple with third person -s and 'every day'.
• C) The students arrived early every day.Simple past would refer to a finished action, not a daily habit.
• D) The students is arriving early every day.Subject-verb agreement error: plural 'students' takes 'arrive'.

Respuesta correcta: A) Do you eat breakfast every morning?

• A) Do you eat breakfast every morning?'Do' + subject + base verb is the standard present simple question.
• B) Do you eating breakfast every morning?After 'do' the verb must be in the base form, not the gerund.
• C) Are you eat breakfast every morning?'Are' cannot be the auxiliary of the main verb 'eat' here.
• D) Did you eat breakfast every morning?'Did' asks about a past action, not about a daily habit.

Respuesta correcta: C) play

• A) playsThe -s ending belongs to he/she/it, not to a plural subject.
• B) is playIllegal combination of an auxiliary and a bare verb.
• C) playPlural subject requires the base form of the verb.
• D) are playedPassive voice is impossible here: the children are the ones who play.

Respuesta correcta: B) every Friday

• A) right now'Right now' would require the present continuous.
• B) every Friday'Every' plus a day of the week marks a recurring habit and forces the present simple.
• C) yesterday'Yesterday' is a past time marker and requires the simple past.
• D) tomorrow'Tomorrow' points to the future and requires a future form.

Respuesta correcta: C) The volcano Izalco erupts every few years.

• A) The volcano Izalco erupt every few years.Missing the third person singular -s on 'erupt'.
• B) The volcanos Izalco erupts every few years.Plural noun with a singular verb; the agreement is inconsistent.
• C) The volcano Izalco erupts every few years.'Izalco' is singular and 'erupts' carries the third person -s.
• D) The volcano Izalco are erupts every few years.Combines a plural auxiliary with a conjugated form; grammatically impossible.