Explanation
An action in a sentence can be represented in two ways, namely active and passive voice.
The passive voice always uses the past participle form of the main verb irrespective of any tense. Only the auxiliary verbs depend upon the sentence given in the active voice.
The correct answer is D)He is known to me.
Option D is correct as the given sentence is in the active voice and to transform it into the passive voice the subject of the given sentence (I) comes in the place of the object(him) and vice versa. Also, as the given sentence is in the simple present tense.
Options A,B, and C are wrong as the preposition (by) cannot be used here, the given sentence is not in the simple past tense, and the tense used is not same as in the given sentence.
The two ways of relating what a person has said are 1)direct and 2)indirect (reported).
In the direct speech, the exact words of the original speaker are repeated.
In the indirect speech (reported speech), the exact meaning of what the speaker told is expressed but not necessarily in the speaker’s exact words.
Option A is correct as the appropriate introductory verb 'said' is used with 'had' which is appropriate when we transform the direct speech which is in the simple past tense.
Options B, C, and D are wrong as 'for' cannot be used, 'told' and 'asked' cannot be used respectively.
The correct answer is A)Ravi said that his father had lived in that city two years before.
The passive voice always uses the past participle form of the main verb irrespective of any tense. Only the auxiliary verbs depend upon the sentence given in active voice.
The given sentence is in the active voice.
The correct answer is A )By whom was this book written?
Option A) is correct as the object of the given sentence(book) comes in the place of the subject (who). Also, the main verb (write) is used in the third form (written ).
Options B, C, and D cannot be used here as 'is' represents the present tense, being cannot be used here.
The passive voice always uses the past participle form of the main verb irrespective of any tense. Only the auxiliary verb depends upon the sentence given in the active voice.
The correct answer is C)The fire has been lit by someone.
Option C is correct as the subject of the given sentence (someone) comes in the place of the object (the fire) and vice versa, the same tense is used (present perfect tense), and 'been' is used with the past participle of the main verb (lit).
The correct answer is C) What was bought by you?
Option C) is correct as the subject of the given sentence(you) becomes the object and vice versa. Also, the main verb (buy) is used in the third form (bought).
Options A, B, and D are not correct as the given sentence is in the past tense, not in present continuous and past continuous tense respectively.
Option B is correct as the direct speech is in the simple past tense.
Options A, C, and D are wrong as 'told', 'told', and 'met' cannot be used respectively.
The correct answer is B)Ravi said that he had met his father last Sunday.
Option A is correct as the direct speech is in the past continuous tense and the appropriate introductory verb (said) is used.
Options B, C, and D are wrong as 'I' cannot be used, 'my dinner' is not transformed and 'me' cannot be used respectively.
The correct answer is A)The watchman cried that the thieves had broken into the house and stolen all the property.
Option B is correct as the direct speech is in the present perfect tense and uses the appropriate introductory verb (cried)
Options A, C, and D are wrong as 'told' cannot be used, the sentence is not transformed and 'had' cannot be used two times respectively.
The correct answer is A)English is spoken all over the world.
Option A is correct as the subject of the given sentence (People) comes in place of the object English) and vice versa, the same tense is used (simple present tense), the sentence is transformed using the appropriate helping verb (is) with the past participle of the main verb (speak).
Option C is correct as the direct speech is in the present perfect tense and the appropriate introductory verb (said) is used.
Options A, B, and D are wrong as 'I' cannot be used, the present perfect tense cannot be used in the transformed sentence, and 'my' cannot be used respectively.
The correct answer is C)He said that he had forgotten the combination of his safe.
The correct answer is C)I am surprised by you.
Option C is correct as the subject of the given sentence (you) comes in the place of the object (me) and vice versa, the same tense is used (simple present tense), and the helping verb 'am' is used with the past participle of the main verb (surprise).
Options A, B,and D are wrong as the object is not mentioned, the subject is not in its place, and 'he' cannot be used respectively
The correct answer is C)Much time is wasted by us on trifles.
The option C is correct as the given sentence is in the active voice and to transform it into the passive active voice, the subject of the given sentence (we) comes in the place of the object (much time) and vice versa. Also, as the sentence is in the simple present tense, the past participle form of the main verb (waste) is used after the helping verb 'is'.
Options A, B, and D are wrong as the given sentence is not in the past tense, the given sentence is not in the future tense, and the subject of the given sentence (we) is missed respectively.
The correct answer is B)Sums are being done by me.
Option B is correct as the subject of the given sentence (I) comes in the place of the object (sums) and vice versa, the same tense is used (present continuous tense), and the sentence is transformed using the appropriate helping verb ('are' as'sums' is plural) with 'being' and past participle of the main verb (do).
Option A is correct as the sentence in the inverted commas is in the simple past tense, so, after transformation, the reported speech is in the past perfect tense.
Options B,C, and D are wrong 'I', 'saw' and 'been' cannot be used respectively.
The correct answer is A)He said that he had seen her two days before.
The correct answer is D)Someone has cut the telegraph wires.
Option D is correct as the given sentence is in the passive voice and to transform it into the active voice, the main verb is used in its third form (cut) and the object of the given sentence comes in the place of the subject.
The correct answer is B)He was seen leaving the house by me.
Option B is correct as the given sentence is in the active voice and to transform it into the passive voice, the subject of the given sentence (I) comes in the place of the object (him) and vice versa. Also, as the given sentence is in the simple past tense.
Options A, C, and D are wrong as the sentence structure is wrong,'had been' cannot be used, and 'be' cannot be used respectively.
Option C is correct as the sentence in the inverted commas is in the simple past tense, so, it is transformed into the past perfect tense.
Options A, B, and D are wrong as the meaning of the sentence is changed using 'my father', 'had' is missing, and 'ago' is not transformed respectively.
The correct answer is C)She said that her father had died a year before.
The correct answer is A)The fresh flowers are picked every morning by them.
Option A is correct as the given sentence is in the active voice and to transform it into the passive voice, the subject of the given sentence (They) comes in the place of the object (the fresh flowers) and vice versa. Also, as the given sentence is in the simple present tense.
Options B, C, and D are wrong as 'are fresh', 'are picked fresh', and 'picked flowers' cannot be used respectively.
The correct answer is A)The bell has been rung by the boy.
Option A is correct as the given sentence is in the active voice and to transform it into the passive voice, the subject of the given sentence (The boy) comes in the place of the object (the bell) and vice versa. Also, as the given sentence is in the present perfect tense.
Options B, C, and D are wrong as the past continuous tense, simple past tense, and 'being' cannot be used respectively.
Option D is correct as the given sentence is in the active voice and to transform it into passive voice the subject of the given sentence (anybody) comes in the place of the object )(all the work) and vice-versa. Also, as the given interrogative sentence is in the present perfect tense, 'been' is used before the past participle form of the main verb (do).
Options A, B.and C are wrong as the phrase 'all the work' represents singularity and so 'have' cannot be used here, the subject is not in its place, and the interrogative sentence should not be transformed to a simple sentence respectively.
The correct answer is D)Has all the work been done by anybody?
Option A is correct as the question in the inverted commas is in the simple future tense, and so, 'would' is used, 'tomorrow' is transformed to 'the next day', and the appropriate introductory verb 'asked' is used.
Options B, C, and D are wrong as 'tomorrow' cannot be used as it is, 'the appropriate conjunction is not used, and 'you' is not transformed respectively.
The correct answer is A)He asked if she would be there the next day.
The option B is correct as the given sentence is in the active voice and to transform it into passive voice the subject of the given sentence (He) comes in the place of the object (us) and vice-versa. Also, as the sentence is in the simple present tense, 'are' is used before the past participle form of the main verb (teach).
Options A, C, and D are wrong as the subject is not in its correct place, the sentence is not in the simple past tense, and the given sentence is not in the future tense respectively.
The correct answer is B)We are taught grammar by him.
The option A is correct as the given sentence is in the active voice and to transform it into passive voice the subject of the given sentence (The storm) comes in the place of the object (much damage) and vice-versa, so, the transformed sentence should start with 'much damage'.
Also, as the sentence is in the simple past tense, 'was' is used before the past participle form of the main verb (did).
Options B, C, and D are wrong as the subject is not in its place in the transformed sentence, 'did' cannot be used here as it is, and the meaning of the transformed sentence comes different from what is given respectively.
The correct answer is A)Much damage was done by the storm.
Option C is correct as the question in the inverted commas is in the simple past tense, and so, 'hadn't put' is used.
Options A, B, and D are wrong as 'told' cannot be used, 'that' is not required, and 'didn't' cannot be used respectively.
The correct answer is C)He asked her why she hadn't put on the brake.
The option C is correct as the given sentence is in the active voice and to transform it into passive voice the subject of the given sentence (I) comes in the place of the object (you) and vice-versa.
Also, as the given sentence is in the simple present tense, 'are' is used before the past participle form of the main verb (expect).
Options A, B, and D are wrong as the subject is not in its place in the transformed sentence, the object of the given sentence does not come in the place of the subject of the given sentence, and 'be' cannot be used here respectively.
The correct answer is C)You are expected to complete this work before sunset.
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