Question

Fill in the blank with the most suitable verb:
I watched TV last night but my sister __________.
(a)hasn’t
(b)didn’t
(c)isn’t
(d)doesn’t

Answer 1

Hint: Look for pointers suggesting which modal auxiliary to use in which blank. The sentence simply states a negative comparison. These pointers are indicators of certain situations.

Complete answer:Verbs are words that show an action (sing), occurrence
(develop), or state of being (exist). Almost every sentence requires a verb. The basic form
of a verb is known as its infinitive.
A modal auxiliary is a type of verb that is used to indicate modality – that is: likelihood,
ability, permission, request, capacity, suggestions, order, obligation, or advice. Modal verbs always accompany the base form of another verb having semantic content.

In the given sentence, the narrator is telling us the fact that they were able to watch the TV the night before, but his sister did not. This means that the first verb should be a positive verb and the blank should contain a negative auxiliary.
Now, we know what we are looking for. Let’s look at the given options:
(a)hasn’t - This indicates that the sister has not yet watched TV, which is wrong. It does not fit into the context of the given sentence. This is not the required answer. So, this is an incorrect option.
(b)didn’t - This indicates that the sister did not watch TV the other night, which is correct. It fits perfectly into the given sentence. This is the required answer. So, this is the correct option.
(c)isn’t - This option is grammatically incorrect for the given sentence. It does not fit into the context of the given sentence. This is not the required answer. So, this is an incorrect option.
(d)doesn’t - This option is grammatically incorrect for the given sentence. It does not fit into the context of the given sentence. This is not the required answer. So, this is an incorrect option.

Note: Understand the meaning of the given sentence, and then go through the given
options. Make sure it is grammatically correct. Then, choose the correct option.