Which sentence contains a linking verb?

a. the senate has looked at the results of the vote.

b. the president has grown tired of waiting.

c. the general shall lead us to victory.

d. the senate should have debated the new law.

The correct answer is B. The president has grown tired of waiting

Explanation:

In grammar, a linking verb or copular verb is a type of verb that does not state one action but connects or links the subject of a sentence with the complement of it by describing a relationship between these two elements. Most common linking verbs include verbs such as be, become or seem and other verbs such as look, sound, taste, feel, grow or appear can work as action verbs expressing an action or as linking verbs. Considering this, in the case presented the sentence that contains a linking verb i "The president has grown tired of waiting", because in this sentence the verb "grown" does not express a specific action but links the subject "The president" with the complement "grown tired" to describe the state of the subject. This means in this case the verb does not express a direct action but links the verb and the complement and therefore the verb is a linking verb.