The plural form of actor is actors.
That is 'actors'
The plural of the noun thespian (actor) is thespians.
The possessive form for the plural noun actors is actors'.Example: The actors' auditions are scheduled for Tuesday.
"Garden" in not gender specific in Englisg; it does not have a masculine or feminine form. While romance languages such as Spanish, French and Latin have a great number of gender specific terms, English has very few, and even these are going by the wayside from disuse, such as "actor" and "actress".
why the subject verb agreement
A proper plural refers to the plural form of a proper noun, which is a specific name used for an individual person, place, or organization. For example, the proper plural of "cat" is "cats," and the proper plural of "Mr. Smith" is "the Smiths."
The plural of "she" is "they", so the plural of "she had" is "they had".
The plural of 'this' is 'these' and the plural of 'that' is 'those'.
Isthmi is plural. There are actually two plural forms. I will list them from singular to plural. Isthmus - Singular Isthmi - Plural Isthmuses - Plural
The plural of rose is roses. The plural possessive is roses'.
applied is does not have a plural but is apply it does have a plural.
Knights is a plural. It is the plural for knight.