Past Continuous

Respuesta correcta: A) were having

• A) were havingCorrect. 'Were having' is the past continuous, which marks the longer action that was already under way when the second event happened.
• B) are havingWrong. 'Are having' is present continuous, which places the dinner at the current moment instead of last night.
• C) hadWrong. 'Had' would require a past participle after it and describes an earlier completed state, not an ongoing dinner.
• D) haveWrong. 'Have' is the base form and cannot carry the past progressive meaning on its own.

Respuesta correcta: B) was sleeping

• A) sleptWrong. 'Slept' is the past simple, which marks a completed action rather than an ongoing one.
• B) was sleepingCorrect. The singular subject takes 'was' plus the gerund, giving the past continuous form 'was sleeping'.
• C) were sleepingWrong. 'Were' is the plural auxiliary and does not agree with a singular subject such as 'he'.
• D) sleepWrong. 'Sleep' is the base form and cannot express any tense without an auxiliary.

Respuesta correcta: C) I was cooking when the phone rang.

• A) I rang when the phone was ringing.Wrong. 'I rang' in the main clause would make the call the long background action, which is not the situation described.
• B) I was ringing when the phone rang.Wrong. 'I was ringing' makes the call the background action and the phone the interruption, which reverses the narrative.
• C) I was cooking when the phone rang.Correct. Cooking is the longer action already in progress, so it takes the past continuous while the call is the interruption.
• D) I rang when I rang the phone.Wrong. 'I rang when I rang the phone' repeats the same action and cannot express an interruption.

Respuesta correcta: D) was playing

• A) has playingWrong. 'Has playing' lacks a past participle after 'has' and is not a valid form.
• B) playsWrong. 'Plays' is present tense and cannot share a past time frame with 'was doing'.
• C) playedWrong. 'Played' in the while-clause would make the two actions sequential rather than simultaneous.
• D) was playingCorrect. Two simultaneous past actions, both in progress, take the past continuous with matching was or were forms.

Respuesta correcta: A) She wasn't sleeping at eleven.

• A) She wasn't sleeping at eleven.Correct. Negating the auxiliary with 'was not' plus the gerund produces the negative past continuous, contracted to 'wasn't'.
• B) She not was sleeping at eleven.Wrong. 'Not' cannot precede the auxiliary in standard English word order.
• C) She wasn't sleep at eleven.Wrong. 'Wasn't sleep' lacks the gerund; after the auxiliary the verb must appear as 'sleeping'.
• D) She didn't sleep at eleven.Wrong. 'Didn't sleep' is a negative past simple and would describe a single completed action rather than an ongoing one.

Respuesta correcta: B) What were you doing at that moment?

• A) What did you do at that moment?Wrong. 'Did you do' asks about a single completed action, not about what was in progress.
• B) What were you doing at that moment?Correct. A question in the past continuous inverts the auxiliary to the front and keeps the gerund after the subject.
• C) What was you doing at that moment?Wrong. 'Was' cannot be used with the subject 'you'; the plural auxiliary 'were' is required.
• D) What you were doing at that moment?Wrong. Without the auxiliary at the front there is no question structure, so this is not a well-formed question.

Respuesta correcta: C) The lights were flickering and the room was freezing.

• A) The lights were flickering and the room froze.Wrong. 'Froze' is past simple and presents the cold as a completed change rather than a continuing condition.
• B) The lights flickered and the room was freezing.Wrong. 'Flickered' in the simple past suggests the flickering came to an end, which a state description should not do.
• C) The lights were flickering and the room was freezing.Correct. Describing two ongoing states at the same moment requires the past continuous in both clauses.
• D) The lights flickered and the room froze.Wrong. Two past simple clauses give a sequence of finished events instead of a simultaneous shared scene.

Respuesta correcta: D) At that moment he was smoking, although he usually avoided cigarettes.

• A) At that moment he smokes, although he avoided cigarettes.Wrong. 'Smokes' is present tense, which cannot sit in a sentence narrated from a past viewpoint.
• B) At that moment he was smoking, although he usually was avoiding cigarettes.Wrong. 'Usually was avoiding' misplaces the adverb before the auxiliary and assigns a continuous to a habit.
• C) At that moment he smoked, although he was usually avoiding cigarettes.Wrong. 'He smoked' would place the action at a completed past moment and 'was usually avoiding' describes an ongoing state, inverting both roles.
• D) At that moment he was smoking, although he usually avoided cigarettes.Correct. The specific ongoing action uses the past continuous while 'usually' plus the past simple presents the general habit.

Respuesta correcta: A) While the rain was pouring, the children were playing in the yard.

• A) While the rain was pouring, the children were playing in the yard.Correct. Both clauses use the past continuous, which is the standard way to present two simultaneous past actions.
• B) While the rain was pouring, the children were play in the yard.Wrong. 'Were play' lacks the gerund after the plural auxiliary.
• C) While the rain was pouring, the children played in the yard.Wrong. 'Played' in the main clause would present the children as finishing their play rather than continuing it.
• D) While the rain poured, the children were playing in the yard.Wrong. 'Rain poured' in the past simple suggests a completed downpour rather than an action continuing.

Respuesta correcta: B) was applying

• A) appliedWrong. 'Applied' is the past simple and would present the application as a single completed event.
• B) was applyingCorrect. An application under way at a stated past moment takes the past continuous to show it was still running.
• C) am applyingWrong. 'Am applying' is present continuous, which has no connection to last March.
• D) applyWrong. 'Apply' is the base form and cannot convey a past situation without an auxiliary.

Respuesta correcta: C) At noon we were waiting at the airport.

• A) At noon we have waited at the airport.Wrong. 'Have waited' is the present perfect, which cannot be placed with a finished past time such as noon.
• B) At noon we waited at the airport.Wrong. 'Waited' is the past simple and suggests the waiting completed at noon rather than continuing.
• C) At noon we were waiting at the airport.Correct. A precise past moment with an activity that was still ongoing is best expressed with the past continuous.
• D) At noon we are waiting at the airport.Wrong. 'Are waiting' is present continuous and belongs to the current moment rather than to a past period.

Respuesta correcta: D) While she was revising her notes, the bell rang.

• A) While she is revising her notes, the bell rang.Wrong. 'Is revising' is present continuous and cannot serve as the background of a past simple event.
• B) While she was revising her notes, the bell rang already.Wrong. 'Rang already' adds an adverb that conflicts with the simple past form and does not repair the meaning.
• C) While she revised her notes, the bell was ringing.Wrong. 'The bell was ringing' makes the bell the background, but a short sound is better presented as an interruption.
• D) While she was revising her notes, the bell rang.Correct. Revision is the longer ongoing activity and the bell is the brief interrupting event, which is the standard past continuous plus past simple pattern.

Respuesta correcta: A) They had been working on the project for months before the funding stopped.

• A) They had been working on the project for months before the funding stopped.Correct. A duration extending up to a past point requires the past perfect continuous, since the activity outlasted the earlier reference moment.
• B) They worked on the project for months before the funding stopped.Wrong. 'Worked' is the past simple and would express a single bounded action rather than an extended duration.
• C) They have been working on the project for months before the funding stopped.Wrong. 'Have been working' is the present perfect continuous and belongs to the present, not to a past reference point.
• D) They were working on the project for months before the funding stopped.Wrong. 'Were working' marks an action in progress but not one that continued right up to the earlier past moment.

Respuesta correcta: B) No, I wasn't.

• A) No, I didn't.Wrong. 'Didn't' is the past simple auxiliary and answers a different question about a completed action.
• B) No, I wasn't.Correct. A negative short answer to a past continuous question repeats the auxiliary 'was' with 'not' and omits the gerund.
• C) No, I not revising.Wrong. 'Not' cannot stand alone in a short answer, and the gerund form is wrong after 'was'.
• D) No, I wasn't revise.Wrong. 'I wasn't revise' lacks the gerund; a short answer contains only the pronoun and the auxiliary.

Respuesta correcta: C) He was driving home when he realised he had left his wallet at the office.

• A) He was driving home while he realised he had left his wallet at the office.Wrong. 'While he realised' sets the realisation as background rather than as the moment of interruption, which weakens the sequence.
• B) He was driving home when he realised he leaves his wallet at the office.Wrong. 'He realises' is present tense, which clashes with the past narration and is the inconsistency the reviewer is flagging.
• C) He was driving home when he realised he had left his wallet at the office.Correct. 'He was driving' is a valid ongoing past action but 'he realises' is present tense and cannot form the interrupting clause.
• D) He drives home when he realised he had left his wallet at the office.Wrong. 'He drives home' is present tense and cannot belong to a sentence anchored in the past.

Respuesta correcta: D) He was running up and down the court when the whistle blew.

• A) He was run up and down the court when the whistle blew.Wrong. 'Was run' uses the base form after the auxiliary, which is only correct with a participle.
• B) He runs up and down the court when the whistle blew.Wrong. 'Runs' is present tense and cannot be coordinated with a past interruption.
• C) He ran up and down the court when the whistle blew.Wrong. 'Ran' presents the movement as completed before the whistle, which removes the sense of activity at that instant.
• D) He was running up and down the court when the whistle blew.Correct. Movement contained within a limited area and still in progress takes the past continuous.

Respuesta correcta: A) He was cycling to school every day that week.

• A) He was cycling to school every day that week.Correct. The continuous with a repeated adverb phrase presents each instance as an unfinished process within the period.
• B) He has cycled to school every day that week.Wrong. 'Has cycled' is the present perfect and cannot be used with the closed past phrase 'that week'.
• C) He was cycling to school once that week.Wrong. 'Once' would be incompatible with a continuous, since a single completed trip is better rendered with the simple past.
• D) He cycled to school every day that week.Wrong. 'Cycled' presents the cycling as a series of completed events, which is the habitual reading of that phrase.

Respuesta correcta: B) We were driving along the coast when the engine started making a strange noise.

• A) We were driving along the coast when the engine makes a strange noise.Wrong. 'Makes' is present tense and breaks the past frame established by 'were driving'.
• B) We were driving along the coast when the engine started making a strange noise.Correct. The journey is background and ongoing, while the engine noise is the short event that interrupted it, both anchored in the past.
• C) We drive along the coast when the engine started making a strange noise.Wrong. 'Drive' is present tense and contradicts 'started making' in the same clause.
• D) We drove along the coast while the engine was making a strange noise.Wrong. 'While' turns the engine noise into a longer background action rather than the interruption.

Respuesta correcta: C) 'The committee was debating the proposal' presents the discussion as an ongoing process, which suits a description of a stage in a long process.

• A) 'The committee debated the proposal' is less accurate because the past simple cannot describe completed actions.Wrong. The past simple describes completed actions perfectly well, so the claim in this option is false.
• B) 'The committee was debating the proposal' is preferred because the continuous is always more formal than the simple past.Wrong. The continuous is not uniformly more formal; register plays a separate role and this explanation is inaccurate.
• C) 'The committee was debating the proposal' presents the discussion as an ongoing process, which suits a description of a stage in a long process.Correct. This explains the aspectual difference rather than asserting a blanket rule, and it correctly identifies what the continuous contributes.
• D) 'The committee was debating the proposal' is preferred because English has no simple past form of the verb to debate.Wrong. 'Debate' has a regular simple past form, so the claim that no such form exists is incorrect.

Respuesta correcta: D) She didn't know the answer at that point.

• A) She not know the answer at that point.Wrong. 'Not' cannot precede the base form without an auxiliary and 'know' would also be the wrong tense.
• B) She didn't knew the answer at that point.Wrong. After 'did' the verb must be the base form, so 'knew' cannot follow it.
• C) She wasn't knowing the answer at that point.Wrong. 'Wasn't knowing' is ungrammatical; stative verbs generally resist the progressive form.
• D) She didn't know the answer at that point.Correct. 'Know' is a stative verb, so standard English uses the simple past and does not allow the progressive in this sense.