Question

Change the following sentences as directed in the brackets:
The farmers have not been ploughing the fields since evening.
He had been waiting for you for an hour.
3. Ishan has been playing since 11 o'clock.
This patient has been taking medicine for five days.
5. Dr Gupta will have been examining the patients since 11 a.m.
6. Mahima has been waiting for her husband for three hours.
7. I shall not have been watching any film since 2015.
3. The policemen had been searching for the thief for three days.
4.
(Affirmative
(Interrogative
(Negative
(Interrogative
(Interrogative
(Negative
(Affirmative
(Interrogative​

Answer 1

Answer:

verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.Option B) have been waiting is correct as present perfect continuous tense is used to indicate an action which started in the past but is continued in the present.

The other options are wrong as ' since 4.20' indicates the use of present continuous perfect tense, not of the present continuous or the past continuous tenses. The correct answer is B)have been waiting.