Question

Fill in the blank with the most appropriate word:
The poor _____ unable to look after themselves.
A. Are
B. Is
C. Was
D. Has been

Answer 1

Hint:An auxiliary verb is a verb that adds functional or grammatical meaning to the clause in which it appears, so as to express tense, aspect, modality, voice, emphasis, etc. Auxiliary verbs usually accompany a main verb. The main verb provides the main semantic content of the clause.

Complete answer:
In this sentence, we would understand the subject verb agreement. The rule states that when a group is considered the verb is always plural. In this case, "poor" specifies a group of people.
"are" is a plural verb in present tense. It is the correct answer
"was" is singular verb in past tense
"has been" is the wrong choice
"is" is used as a singular verb in present tense..

Hence the correct answer is option ‘A’.

Note:Auxiliary verb is used together with a main verb to show the verb's tense or to form a negative or question. The most common auxiliary verbs are have, be, and do. Auxiliary, in grammar, a helping element, typically a verb, that adds meaning to the basic meaning of the main verb in a clause. Auxiliaries can convey information about tense, mood, person, and number. An auxiliary verb occurs with a main verb that is in the form of an infinitive or a participle. In English there are two types of auxiliary verbs, primary auxiliaries and modal auxiliaries.