Fill in the blank with the most appropriate word.
She likes ____ TV, but her husband doesn’t.
(a)watch
(b)to watch
(c)watches
(d)watched

Hint: Use the to-infinitive verb to modify the main verb in a sentence. The infinitive verb can act as a noun, adjective or an adverb.

Complete answer: As given in the hint, infinitive verbs always accompany the main verb.
Let’s look at the structure and usage of infinitive verbs-
Structure- To + base form of a verb
Usage- We need to think about it. Here, ‘need’ is the main form of the verb while ‘to think’ is the infinitive that is modifying the main verb.
Now, let’s examine the given options-
(a)‘watch’ is an incorrect option because there is already a main verb, ‘likes’ in the sentence.
(b)‘to watch’ is the correct option because the infinitive always follows the main verb in a sentence.
(c)‘watches’ is an incorrect option because we can already see the use of the main verb, ‘likes’ in the sentence.
(d)‘watched’ is an incorrect option because there is already a main verb, ‘likes’ in the sentence.
In the given question- We can conclude that X likes to watch Tv, but her husband doesn’t. Here, the main verb, ‘likes’ is followed by the infinitive ‘to watch’.

Note: Keep in mind, an infinitive cannot act as the main verb in a sentence. Also, the to-infinitive always follows the main verb. For example- Verb + to-infinitive.