The students, as well as the teacher, are nervous about the test.

Question:

The students, as well as the teacher, (is, are) nervous about the test.

The students, as well as the teacher, are nervous about the test.

Explanation:

Is and are are both present tense conjugations of the verb ‘to be’. Is is the singular form of be whereas are is the plural form of be. Therefore, the main difference between is and are is that is is singular whereas are is plural.

Singular- (of a word or form) denoting or referring to just one person or thing.

Plural- (of a word or form) denoting more than one, or (in languages with dual number) more than two.

is there an image you meant to add?

explanation:

tree and the cat in the tree