The plural form IS functions. The singular form is function.
Dramatics functions as both singular and plural
The word 'sightseeing' is a gerund, the present participle of a verb that functions as a noun. Gerunds have no plural form.
A quadratic function is a noun. The plural form would be quadratic functions.
The noun 'nursing' is a gerund, the present participle of the verb to nurse that functions as a noun. A gerund is an uncountable noun with no plural form. The possessive form is nursing's. Example:Marcy loves her job, but nursing's rewards are not monetary.
A quadratic function is a noun. The plural form would be quadratic functions.
The form 'saltworks' functions as a singular or a plural noun. Example: singular: Jim is applying for a job at the saltworks. plural: We have invested in a number of saltworks.
The noun 'measles' is an uncountable noun.The noun measles is plural in form but functions as a singular noun.Examples: He had a case of the measles.
Functions.
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."