The word “each” refers to a singular subject within a group of countable nouns, so it is technically a singular word. Some American English speakers may be unclear on this technicality due to the subject-verb agreement rules that apply to the use of “each.”

In general, use a singular verb with each when it is followed by of and a plural noun phrase (“ Each of...”). The subject of such a clause is the word each, which is singular, and the grammatically correct verb to use with it is singular rather than plural.

Under the traditional rule, the indefinite pronoun each is always singular and takes a singular verb.

As a pronoun, each is considered singular, so it is traditionally paired with singular verbs.