Pregunta 1
Pregunta 1 · D4Bloom: ApplyA visitor describes a view of the coast at the end of a trip.
Never ____ such a beautiful sunset in my life.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A) have I seen
💡 Explicación
Fronted negative adverbials trigger subject and auxiliary inversion in the present perfect, without any form of 'do'.
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Respuesta correcta: A) have I seen
- A) have I seenCorrect! When a negative adverb such as 'never' opens the sentence, the subject and the auxiliary are inverted.
- B) I have seen'I have seen' keeps the normal order and would need the negative adverb inside the sentence.
- C) did I see'Did I see' changes the tense, and the present perfect is the natural tense here.
- D) I did see'I did see' is a normal order affirmative and cannot follow 'never' at the start.
💡 Explicación
Fronted negative adverbials trigger subject and auxiliary inversion in the present perfect, without any form of 'do'.
Pregunta 2
Pregunta 2 · D4Bloom: ApplyA head teacher comments on the atmosphere at a school sports event.
Rarely ____ the school so excited about a sports day.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B) are the students
💡 Explicación
Only the auxiliary 'be' moves in the inversion; the subject 'the students' follows it and no other element changes.
Ver respuesta
Respuesta correcta: B) are the students
- A) the students are'The students are' keeps the declarative order, which is not allowed with a fronted negative.
- B) are the studentsCorrect! 'Are the students' inverts the auxiliary before the subject, as the fronted 'rarely' requires.
- C) the students were'The students were' keeps the order and also changes the tense without reason.
- D) were the students'Were the students' inverts the order but the present tense is required by 'rarely' with this state.
💡 Explicación
Only the auxiliary 'be' moves in the inversion; the subject 'the students' follows it and no other element changes.
Pregunta 3
Pregunta 3 · D4Bloom: AnalyzeA student comments on the clarity of a teacher's explanations over a term.
Not once ____ the teacher explain this rule so clearly.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C) has
💡 Explicación
Negative expressions such as 'not once', 'not only' and 'seldom' invert the subject and the auxiliary exactly like 'never' and 'rarely'.
Ver respuesta
Respuesta correcta: C) has
- A) have'Have' would not agree with the singular subject 'the teacher'.
- B) had'Had' is the past, and the rule is explained regularly in the present.
- C) hasCorrect! 'Has' with the negative phrase 'not once' in front triggers inversion of subject and auxiliary.
- D) having'Having' is a participle and cannot serve as the auxiliary of the clause.
💡 Explicación
Negative expressions such as 'not once', 'not only' and 'seldom' invert the subject and the auxiliary exactly like 'never' and 'rarely'.
Pregunta 4
Pregunta 4 · D5Bloom: AnalyzeA classmate reports the achievements of a top student over a school year.
Not only ____ the exam, but she also topped the class.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D) did she pass
💡 Explicación
When 'do' is needed, inversion places 'do' or 'does' before the subject: 'did she pass', never 'she did pass' at the front.
Ver respuesta
Respuesta correcta: D) did she pass
- A) she passed'She passed' is the normal order and cannot follow a fronted 'not only'.
- B) she did pass'She did pass' keeps the subject in front of the auxiliary, so no inversion occurs.
- C) passed she'Passed she' inverts the main verb and the subject but leaves out the auxiliary the construction needs.
- D) did she passCorrect! The negative correlative 'not only' at the front requires the auxiliary 'did' before the subject.
💡 Explicación
When 'do' is needed, inversion places 'do' or 'does' before the subject: 'did she pass', never 'she did pass' at the front.
Pregunta 5
Pregunta 5 · D4Bloom: ApplyA routine at the end of a lesson in a secondary school.
Only after the bell rang ____ the students leave the classroom.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A) did
💡 Explicación
A fronted phrase beginning with 'only' or 'not until' is a focusing adverbial, and it triggers inversion of the auxiliary and the subject.
Ver respuesta
Respuesta correcta: A) did
- A) didCorrect! 'Did' is the auxiliary placed before the subject because 'only after' opens the sentence.
- B) the students'The students' cannot occupy that slot, since the subject follows the auxiliary in the inverted clause.
- C) they'They' would be a pronoun subject and there is no auxiliary to invert here.
- D) were'Were' is a form of 'be', but the main verb of the sentence is 'leave'.
💡 Explicación
A fronted phrase beginning with 'only' or 'not until' is a focusing adverbial, and it triggers inversion of the auxiliary and the subject.
Pregunta 6
Pregunta 6 · D4Bloom: ApplyA coach describes the mood of a team before an important match.
Seldom ____ the whole class so motivated before the competition.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B) has
💡 Explicación
The negative adverb 'seldom' belongs to the same group as 'rarely' and 'hardly', and all of them invert the auxiliary and the subject.
Ver respuesta
Respuesta correcta: B) has
- A) have'Have' would not agree with a singular subject.
- B) hasCorrect! 'Has' is the auxiliary that inverts with the singular subject 'the whole class' after 'seldom'.
- C) was'Was' would form a passive or a linking clause, and the sentence is active.
- D) is'Is' would describe a state rather than the action of being motivated.
💡 Explicación
The negative adverb 'seldom' belongs to the same group as 'rarely' and 'hardly', and all of them invert the auxiliary and the subject.
Pregunta 7
Pregunta 7 · D5Bloom: AnalyzeA group describes the moment a vehicle reached a stop near a school.
No sooner ____ the bus arrived than the students rushed in.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C) had
💡 Explicación
'No sooner ... than' is a fixed correlative that always carries the past perfect inversion, independent of any other rule.
Ver respuesta
Respuesta correcta: C) had
- A) did'Did' would be the inversion of a present or past simple, which the pair does not use.
- B) was'Was' is a form of 'be' and cannot invert here.
- C) hadCorrect! 'Had' is the past perfect auxiliary required by the fixed pair 'no sooner ... than'.
- D) has'Has' is the present perfect, and the pair requires the past perfect.
💡 Explicación
'No sooner ... than' is a fixed correlative that always carries the past perfect inversion, independent of any other rule.
Pregunta 8
Pregunta 8 · D5Bloom: AnalyzeA relative describes how a family member spent an evening at home.
So absorbed ____ in the book that she forgot the time.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D) was she
💡 Explicación
A fronted pattern of 'so ... that' moves the auxiliary in front of the subject, leaving the rest of the clause in normal order.
Ver respuesta
Respuesta correcta: D) was she
- A) she was'She was' keeps the normal order, which is not possible with a fronted intensifier of this type.
- B) she is'She is' changes the tense that the story requires.
- C) is she'Is she' inverts correctly but the past tense is needed by the narrative.
- D) was sheCorrect! The fronted adjective 'so absorbed' inverts the auxiliary 'was' before the subject.
💡 Explicación
A fronted pattern of 'so ... that' moves the auxiliary in front of the subject, leaving the rest of the clause in normal order.
Pregunta 9
Pregunta 9 · D5Bloom: AnalyzeA person narrates two events that happened within a few seconds of each other.
Hardly had she sat down ____ the phone rang.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A) when
💡 Explicación
The construction 'hardly had ... when' is a fixed inversion pattern that reports two closely connected past events.
Ver respuesta
Respuesta correcta: A) when
- A) whenCorrect! 'When' completes the fixed pair 'hardly ... when', which links two past events.
- B) than'Than' belongs to comparisons and to the less standard 'hardly ... than'.
- C) then'Then' is an adverb of sequence and cannot follow the inverted clause.
- D) since'Since' marks a starting point in time and does not pair with 'hardly had'.
💡 Explicación
The construction 'hardly had ... when' is a fixed inversion pattern that reports two closely connected past events.
Pregunta 10
Pregunta 10 · D4Bloom: AnalyzeA member of staff asks about a document during a short meeting.
The teacher asked where ____ the missing file was.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B) the director put
💡 Explicación
Direct questions invert subject and auxiliary, but an embedded question after a verb of asking restores the declarative order.
Ver respuesta
Respuesta correcta: B) the director put
- A) did the director put'Did the director put' is a direct question order and does not belong inside a reported clause.
- B) the director putCorrect! In an embedded question the subject precedes the auxiliary, so no inversion applies.
- C) the director did put'The director did put' is the order of a direct question with emphasis, which is not wanted here.
- D) put the director'Put the director' inverts the main verb and the subject and leaves the clause without an auxiliary.
💡 Explicación
Direct questions invert subject and auxiliary, but an embedded question after a verb of asking restores the declarative order.
Pregunta 11
Pregunta 11 · D4Bloom: ApplyA student asks for confirmation about a change in the school calendar.
I do not know whether ____ the meeting has been moved or not.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C) has
💡 Explicación
Question words such as 'whether', 'what', 'where' and 'how' are moved to the front of the main clause while the embedded clause keeps its own order.
Ver respuesta
Respuesta correcta: C) has
- A) has it'Has it' reverses that order and treats the clause as a direct question.
- B) it has'It has' inverts the subject and the auxiliary without a fronted negative to justify it.
- C) hasCorrect! In an embedded question the subject comes before the auxiliary, so 'has the meeting' is correct.
- D) have'Have' would not agree with the singular subject 'the meeting'.
💡 Explicación
Question words such as 'whether', 'what', 'where' and 'how' are moved to the front of the main clause while the embedded clause keeps its own order.
Pregunta 12
Pregunta 12 · D4Bloom: ApplyA school leader reports at a staff meeting what he said at a previous meeting.
The headmaster said that he ____ see the results the following morning.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D) would
💡 Explicación
A reporting verb in the past moves the reported clause one step back in tense, so a future modal becomes its past form.
Ver respuesta
Respuesta correcta: D) would
- A) will'Will' would keep the original future of the direct speech and break the sequence of tenses.
- B) shall'Shall' is used in formal offers and declarations, and it does not carry a backshift here.
- C) should'Should' would change the meaning to obligation, which the sentence does not express.
- D) wouldCorrect! A past reporting verb 'said' shifts the reported future to the past: 'will' becomes 'would'.
💡 Explicación
A reporting verb in the past moves the reported clause one step back in tense, so a future modal becomes its past form.
Pregunta 13
Pregunta 13 · D5Bloom: AnalyzeA building rule is displayed at the entrance of a laboratory.
Under no circumstances ____ the door be left unlocked.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A) should
💡 Explicación
The modal 'should' already has the inverted position, so the bare 'be' follows the subject and no further change is needed.
Ver respuesta
Respuesta correcta: A) should
- A) shouldCorrect! 'Should' follows 'under no circumstances' because that phrase is a negative fronted expression.
- B) it should'It should' puts the subject first, which is the order the fronted phrase forbids.
- C) should it'Should it' inverts the auxiliary and the subject and would leave the main verb 'be' without a subject.
- D) must'Must' is not a form of 'be' and cannot complete this clause.
💡 Explicación
The modal 'should' already has the inverted position, so the bare 'be' follows the subject and no further change is needed.
Pregunta 14
Pregunta 14 · D4Bloom: ApplyA legal office states a firm rule about the handling of documents.
On no account ____ he sign the document without reading it first.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B) did
💡 Explicación
'On no account' belongs to the same inverting group as 'under no circumstances' and 'in no way'.
Ver respuesta
Respuesta correcta: B) did
- A) he did'He did' keeps the subject before the auxiliary and gives no inversion at all.
- B) didCorrect! 'On no account' is a negative fronted phrase, so the auxiliary 'did' precedes the subject.
- C) should'Should' would express obligation or advice, which is not the relation stated.
- D) does'Does' is the present auxiliary, and the sentence reports a past act of signing.
💡 Explicación
'On no account' belongs to the same inverting group as 'under no circumstances' and 'in no way'.
Pregunta 15
Pregunta 15 · D3Bloom: ApplyA driver describes a scene observed from a vehicle near a river.
A driver waited at the junction while two girls ____ a narrow path above the river.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C) climbed
💡 Explicación
Two coordinated clauses in a narration share the same tense, and nothing fronted justifies any inversion here.
Ver respuesta
Respuesta correcta: C) climbed
- A) climbed up'Climbed up' would add a particle that the sentence does not need for a plain report of the event.
- B) climbs up'Climbs up' is the present simple and does not match the past narration.
- C) climbedCorrect! 'Climbed' reports a completed action in the past simple, which matches the first clause of the narration.
- D) are climbing up'Are climbing up' is the present continuous and would suggest an action still unfinished.
💡 Explicación
Two coordinated clauses in a narration share the same tense, and nothing fronted justifies any inversion here.
Pregunta 16
Pregunta 16 · D5Bloom: AnalyzeA sports report describes the restart of a match interrupted by bad weather.
Not until the storm had completely passed ____ they resume the match.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D) did
💡 Explicación
A fronted 'not until' is a focusing negative that behaves exactly like 'only after' and 'not before'.
Ver respuesta
Respuesta correcta: D) did
- A) they did'They did' keeps the declarative order, so the sentence is not inverted.
- B) were'Were' is a form of 'be' and cannot invert the main verb 'resume'.
- C) have'Have' would need 'resumed' and cannot introduce a simple past clause by itself.
- D) didCorrect! The fronted negative phrase 'not until' triggers the auxiliary 'did' before the subject.
💡 Explicación
A fronted 'not until' is a focusing negative that behaves exactly like 'only after' and 'not before'.
Pregunta 17
Pregunta 17 · D4Bloom: ApplyA teacher announces the examination calendar to the students.
The teacher explained that the final exam ____ take place the first week of July.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A) would
💡 Explicación
The sequence of tenses moves a reported future one step back when the verb of reporting is itself in the past.
Ver respuesta
Respuesta correcta: A) would
- A) wouldCorrect! A past reporting verb backshifts the reported 'will' to 'would'.
- B) will'Will' would keep the original future and break the sequence of tenses.
- C) shall'Shall' is a formal alternative of 'will' but it is not the form a backshift produces.
- D) must'Must' would express obligation, which the sentence does not state.
💡 Explicación
The sequence of tenses moves a reported future one step back when the verb of reporting is itself in the past.
Pregunta 18
Pregunta 18 · D4Bloom: AnalyzeA recruiter reports how several candidates performed in a selection process.
Out of the three candidates, only the second ____ the interview without any preparation.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B) passed
💡 Explicación
The focus word 'only' falls inside the subject, so the clause keeps the normal order. Inversion needs the focusing element at the very front.
Ver respuesta
Respuesta correcta: B) passed
- A) passes'Passes' is the present simple and does not match the narration.
- B) passedCorrect! 'Passed' is the past simple that the narrative requires, and 'only' modifies the subject rather than opening the clause.
- C) pass'Pass' is the base form and would need a modal or an auxiliary.
- D) passing'Passing' is a participle and cannot be the only verb of a finite clause.
💡 Explicación
The focus word 'only' falls inside the subject, so the clause keeps the normal order. Inversion needs the focusing element at the very front.
Pregunta 19
Pregunta 19 · D4Bloom: ApplyAn organiser describes how much an audience knew in advance of an announcement.
Little ____ the committee know about the change of venue before it was announced.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C) did
💡 Explicación
'Little', 'hardly', 'barely' and 'scarcely' invert like the negative adverbs, and they are followed by an auxiliary before the subject.
Ver respuesta
Respuesta correcta: C) did
- A) they did'They did' keeps the subject first and produces no inversion.
- B) was'Was' is a form of 'be' and cannot invert with the main verb 'know'.
- C) didCorrect! 'Did' is the auxiliary that inverts before the subject after the fronted 'little'.
- D) has'Has' is the present perfect auxiliary, and the report describes a past state of knowledge.
💡 Explicación
'Little', 'hardly', 'barely' and 'scarcely' invert like the negative adverbs, and they are followed by an auxiliary before the subject.
Pregunta 20
Pregunta 20 · D3Bloom: ApplyA bus driver addresses passengers after an unexpected delay on a rural route.
The bus driver apologised because the road ____ blocked by fallen branches.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D) was
💡 Explicación
In a passive clause the auxiliary comes before the past participle, and the past simple is required by the reported event.
Ver respuesta
Respuesta correcta: D) was
- A) were'Were' would not agree with a singular subject.
- B) has'Has' is the present perfect, and the blockage is a completed past event.
- C) having'Having' is a participle and cannot be the auxiliary of a finite passive clause.
- D) wasCorrect! 'Was' is the passive auxiliary and agrees with the singular subject 'the road'.
💡 Explicación
In a passive clause the auxiliary comes before the past participle, and the past simple is required by the reported event.