"To be" verbs are some form of the verb "be" (e.g. "is", "am", "was", "will be" etc.)
The function of a "to be" verb is either to state that something exists, or (more commonly) to equate the subject with something else- either another noun or something that describes the subject.
"To be" Verbs: Forms of the Verb "be" that equates the subject with existence, another noun, or a description. The "to be" verbs are highlighted in the following sentences.
Jim is a pitcher.
The ball was white and round.
Click on the "to be" Verbs in the following sentences.