Rewrite the sentence, instead of using 'somebody' or 'they', write a passive sentence:
They have postponed the concert.
The correct option is C The concert has been postponed by them.
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 active voice.
The correct answer is D)The concert has been postponed by them.
The option D is correct as the given sentence is in active voice and to transform it into passive voice the subject of the given sentence
(They) comes in the place of the object(the concert) and vice versa. Also, as the sentence is in the present perfect tense, 'been' is added after the helping verb 'has' and before the past participle form of the main verb(postpone).
Options A, B, and C are wrong as had been, is, and was cannot be used respectively.
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 active voice.
The correct answer is D)The concert has been postponed by them.
The option D is correct as the given sentence is in active voice and to transform it into passive voice the subject of the given sentence
(They) comes in the place of the object(the concert) and vice versa. Also, as the sentence is in the present perfect tense, 'been' is added after the helping verb 'has' and before the past participle form of the main verb(postpone).
Options A, B, and C are wrong as had been, is, and was cannot be used respectively.
