**Rule**: For a sentence in the Simple Past Tense, the passive voice structure is **Object + was/were + V3 + by + Subject**.
- **Correct Answer (b)**: The object 'several trees' becomes the subject. Since 'trees' is plural, 'were' is used, followed by the past participle 'uprooted'.
- **Incorrect Answer (a)**: This incorrectly changes the tense to Simple Present.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Past Continuous.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Present Perfect.
122
Which route did you take?
Answer:
Which route was taken by you?
**Rule**: For an interrogative sentence in the Simple Past Tense starting with 'Which', the passive structure is **Which + noun + was/were + V3 + by + subject?**
- **Correct Answer (c)**: 'Which route' remains at the beginning. As 'route' is singular, it is followed by 'was' and the past participle 'taken'.
- **Incorrect Answer (a)**: This incorrectly changes the tense to Simple Present.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Past Continuous.
123
The company has to check all the details.
Answer:
All the details have to be checked by the company.
**Rule**: When the active sentence uses 'has to'/'have to', the passive form is **Object + has/have to + be + V3**. The choice between 'has' and 'have' depends on the new subject.
- **Correct Answer (d)**: The object 'all the details' becomes the subject. Since 'details' is plural, it takes 'have to be', followed by the past participle 'checked'.
- **Incorrect Answer (a)**: 'have been checked' is the passive of the Present Perfect Tense.
- **Incorrect Answer (b)**: 'are to be' implies a plan, not the necessity of 'have to'.
- **Incorrect Answer (c)**: 'had to be' incorrectly changes the tense to the past.
124
We were not expecting such a result.
Answer:
Such a result was not being expected by us.
**Rule**: For a negative sentence in the Past Continuous Tense, the passive voice structure is **Object + was/were + not + being + V3 + by + Subject**.
- **Correct Answer (c)**: The object 'such a result' becomes the subject. The passive verb form 'was not being expected' correctly reflects the negative Past Continuous tense.
- **Incorrect Answer (a)**: This incorrectly changes the tense to Simple Past.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Present Continuous.
125
Who is going to water the plants?
Answer:
By whom are the plants going to be watered?
**Rule**: For an interrogative sentence with the 'be going to' future form starting with 'Who', the passive structure is **By whom + is/am/are + object + going to be + V3?**
- **Correct Answer (b)**: 'Who' changes to 'By whom'. The object 'the plants' is plural, so 'are' is used, followed by the object and the correct passive structure 'going to be watered'.
- **Incorrect Answer (a)**: This changes the structure from 'going to' future to 'will' future.
- **Incorrect Answer (c)**: The verb 'is' is incorrect because the subject 'plants' is plural.
- **Incorrect Answer (d)**: 'who' is the incorrect case; 'whom' is required after the preposition 'By'.
126
How did you find the solution?
Answer:
How was the solution found by you?
**Rule**: For an interrogative sentence in the Simple Past Tense starting with a 'Wh-' word, the passive structure is **Wh- word + was/were + object + V3 + by + subject?**
- **Correct Answer (d)**: The 'Wh-' word 'How' remains at the beginning. The object 'the solution' is singular, so 'was' is used, followed by the past participle 'found'.
- **Incorrect Answer (a)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Simple Present.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Past Continuous.
127
Who could have written such a beautiful poem?
Answer:
By whom could such a beautiful poem have been written?
**Rule**: For an interrogative sentence with a past modal starting with 'Who', the passive structure is **By whom + modal + have been + V3?**
- **Correct Answer (c)**: 'Who' becomes 'By whom'. The past modal passive form 'could have been written' is used. The word order is correct for a question, with the modal 'could' coming before the subject.
- **Incorrect Answer (a)**: 'could be written' is the passive for a present modal.
- **Incorrect Answer (b)**: The word order is incorrect; the subject 'such a beautiful poem' should come between 'could' and 'have'.
- **Incorrect Answer (d)**: 'can' is a different modal.
128
The teacher had already explained the topic.
Answer:
The topic had already been explained by the teacher.
**Rule**: For a Past Perfect Tense sentence, the passive voice structure is **Object + had + been + V3 + by + Subject**. Adverbs like 'already' are typically placed between 'had' and 'been'.
- **Correct Answer (d)**: The object 'the topic' becomes the subject. The verb form 'had already been explained' is the correct passive construction.
- **Incorrect Answer (a)**: This incorrectly changes the tense to Simple Past.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Simple Present.
129
They had to cancel the meeting due to bad weather.
Answer:
The meeting had to be cancelled due to bad weather.
**Rule**: When the active sentence uses 'had to' to show past necessity, the passive form is **Object + had to + be + V3**. The agent 'by them' can be omitted.
- **Correct Answer (c)**: The object 'the meeting' becomes the subject. The structure 'had to be cancelled' is the correct passive form for the past necessity. The agent 'by them' is correctly and naturally omitted.
- **Incorrect Answer (a)**: 'had been cancelled' is the passive of the Past Perfect Tense ('had cancelled'), not 'had to cancel'.
- **Incorrect Answer (b)**: 'was to be' implies a past plan, which is a different meaning from past necessity.
- **Incorrect Answer (d)**: 'has to be' incorrectly changes the tense to the present.
130
The city is going to build a new park.
Answer:
A new park is going to be built by the city.
**Rule**: For active sentences using the 'be going to' future form, the passive structure is **Object + is/am/are + going to be + V3**.
- **Correct Answer (d)**: The object 'a new park' becomes the subject. The structure 'is going to be built' is the correct passive conversion.
- **Incorrect Answer (a)**: This is the passive of the Present Continuous tense ('is building').
- **Incorrect Answer (b)**: This changes the structure to the 'will' future.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Present Perfect.
131
Who could have done this?
Answer:
By whom could this have been done?
**Rule**: For an interrogative sentence with a past modal (modal + have + V3) starting with 'Who', the passive structure is **By whom + modal + have been + V3?**
- **Correct Answer (b)**: 'Who' becomes 'By whom'. The past modal passive form 'could have been done' is used. The word order is correct for a question, with the modal 'could' coming before the subject 'this'.
- **Incorrect Answer (a)**: 'could this be done' is the passive for a present modal ('could do'), not a past modal.
- **Incorrect Answer (c)**: This has incorrect word order for a question; 'could' should be before 'this'.
- **Incorrect Answer (d)**: This also has incorrect word order; the subject 'this' should come between 'could' and 'have'.
132
The teacher had not yet announced the results.
Answer:
The results had not yet been announced by the teacher.
**Rule**: For a negative sentence in the Past Perfect Tense, the passive structure is **Object + had + not + been + V3 + by + Subject**. Adverbs like 'yet' are usually placed after 'not'.
- **Correct Answer (a)**: The object 'the results' becomes the subject. The verb form 'had not yet been announced' is the correct passive construction and adverb placement.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Simple Past.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (d)**: The word order 'yet not' is grammatically incorrect.
133
We had to postpone the trip.
Answer:
The trip had to be postponed by us.
**Rule**: When the active sentence uses 'had to' to show past necessity, the passive form is **Object + had to + be + V3**.
- **Correct Answer (d)**: The object 'the trip' becomes the subject. The structure 'had to be postponed' is the correct passive form for the past necessity.
- **Incorrect Answer (a)**: 'had been postponed' is the passive of the Past Perfect Tense ('had postponed'), not 'had to postpone'.
- **Incorrect Answer (b)**: 'has to be' incorrectly changes the tense to the present.
- **Incorrect Answer (c)**: 'was to be' implies a past plan, which is a different meaning from past necessity.
134
They were not serving dinner when we arrived.
Answer:
Dinner was not being served when we arrived.
**Rule**: In a complex sentence, the main clause 'They were not serving dinner' (negative Past Continuous) is passivized, while the subordinate clause 'when we arrived' remains unchanged.
- **Correct Answer (a)**: The object 'dinner' becomes the subject. The verb form 'was not being served' is the correct passive for the negative Past Continuous. The agent 'by them' is omitted.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Simple Past.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Present Continuous.
135
The author will release his new book next month.
Answer:
His new book will be released by the author next month.
**Rule**: To convert a Future Simple Tense sentence to passive voice, the structure is **Object + will/shall + be + V3 + by + Subject**.
- **Correct Answer (a)**: The object 'his new book' becomes the subject. The passive verb form 'will be released' correctly reflects the Future Simple Tense.
- **Incorrect Answer (b)**: 'would' is an incorrect modal verb, changing the certainty of the statement.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Present Continuous.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Future Perfect.
136
The company is launching a new product next year.
Answer:
A new product is being launched by the company next year.
**Rule**: The Present Continuous Tense can be used for a fixed plan in the near future. Its passive form is **Object + is/am/are + being + V3**. The future time adverbial ('next year') is retained.
- **Correct Answer (a)**: The object 'a new product' becomes the subject. The passive verb 'is being launched' correctly reflects the Present Continuous used for a future plan.
- **Incorrect Answer (b)**: While 'will be launched' is also correct for the future, option (a) is the direct passive conversion of the given Present Continuous tense.
- **Incorrect Answer (c)**: This incorrectly uses the Simple Present passive, which is not appropriate for a future plan.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Present Perfect.
137
Who could have predicted such a result?
Answer:
By whom could such a result have been predicted?
**Rule**: For an interrogative sentence with a past modal starting with 'Who', the passive structure is **By whom + modal + have been + V3?**
- **Correct Answer (c)**: 'Who' becomes 'By whom'. The past modal passive form 'could have been predicted' is used. The word order is correct for a question, with the modal 'could' coming before the subject 'such a result'.
- **Incorrect Answer (a)**: 'could be predicted' is the passive for a present modal.
- **Incorrect Answer (b)**: 'can' is a different modal.
- **Incorrect Answer (d)**: This has incorrect word order for a question.
138
The company had not foreseen the crisis.
Answer:
The crisis had not been foreseen by the company.
**Rule**: For a negative sentence in the Past Perfect Tense, the passive structure is **Object + had + not + been + V3 + by + Subject**.
- **Correct Answer (a)**: The object 'the crisis' becomes the subject. The verb form 'had not been foreseen' is the correct passive construction for a negative sentence in the Past Perfect Tense.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Simple Past.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Past Continuous.
139
The sudden noise frightened the child.
Answer:
The child was frightened by the sudden noise.
**Rule**: For a sentence in the Simple Past Tense, the passive voice structure is **Object + was/were + V3 + by + Subject**.
- **Correct Answer (a)**: The object 'the child' becomes the subject. Since 'child' is singular, 'was' is used, followed by the past participle 'frightened'.
- **Incorrect Answer (b)**: This incorrectly changes the tense to Simple Present.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Past Continuous.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Present Perfect.
140
Someone had left the door open.
Answer:
The door had been left open.
**Rule**: For a Past Perfect Tense sentence, the passive structure is **Object + had + been + V3**. The indefinite subject 'someone' is omitted.
- **Correct Answer (b)**: The object 'the door' becomes the subject. The verb form 'had been left' is the correct passive construction for the Past Perfect Tense. The agent 'by someone' is correctly omitted.
- **Incorrect Answer (a)**: This incorrectly changes the tense to Simple Past.
- **Incorrect Answer (c)**: This incorrectly changes the tense to Present Perfect.
- **Incorrect Answer (d)**: This incorrectly changes the tense to Past Continuous.
