Most adjectives in the English language, including necessary, do not have a separate plural form. The plural of 'is necessary' is 'are necessary'.
This differs from languages like Spanish, in which you make an adjective plural when you make the word it modifies plural. For example, in English the plural of 'white cat' is 'white cats', whereas in Spanish the plural of 'gato blanco' is 'gatos blancos'.
The word necessary is an adjective and so doesn't have a plural noun. The noun form is necessity and the plural is necessities.
The plural form of ficus is ficuses.
The plural form of hemp is hemp.
No plural for radium.
Scenarios is the plural form.
The word "necessary" is an adjective, and has no plural. The noun form "necessity" has the plural form "necessities."
The word necessary is an adjective and so doesn't have a plural noun. The noun form is necessity and the plural is necessities.
The plural of governor is governors (no apostrophe necessary). The plural possessive form of governor is governors'.
The word necessary is an adjective and so doesn't have a plural noun. The noun form is necessity and the plural is necessities.
It is seldom necessary to use the word Harry in a plural form, but if such a situation arises, the plural is Harry's. This should not be confused with harries, which is a verb.
There is no plural form of this noun. It is the name of a single, unique area of study (science). No plural form is necessary. Alternatively, "physics" is already the plural form of the word "physic", a now-archaic word meaning "medicine".
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."
The plural form of "I" is "we."
The plural form of "was" is "were."