When should we use to be?

The verb “To be” most frequently works in conjunction with another verb: “He is playing the piano,” “She will be arriving this afternoon.” Occasionally, though, the verb will stand by itself, alone, in a sentence. This is especially true in simple, brief answers to questions.

When should is or are be used?

When deciding whether to use is or are, look at whether the noun is plural or singular. If the noun is singular, use is. If it is plural or there is more than one noun, use are. The cat is eating all of his food.