Not till he got home he did realise that he had lost his keys in the theatre. A. did he realise B. he did not realise C. he realised D. No improvement

The correct answer is: C. he realised

The sentence “Not till he got home he did realise that he had lost his keys in the theatre” is grammatically incorrect. The correct sentence should be “Not until he got home did he realize that he had lost his keys in the theatre.”

The word “till” is a preposition that means “until.” In this sentence, it is used to indicate that the action of realizing did not happen until a certain point in time. The word “did” is a helping verb that is used to form the past tense of the verb “realize.” The word “realize” means to become aware of something.

In the sentence “Not till he got home he did realise that he had lost his keys in the theatre,” the word “did” is used incorrectly. The word “did” should be used to form the past tense of the verb “realize,” but in

The other options are also incorrect. Option A, “did he realise,” is incorrect because it does not use the correct verb tense. Option B, “he did not realise,” is incorrect because it does not use the correct word order. Option D, “No improvement,” is incorrect because the sentence is grammatically incorrect.