Library is a singular noun. For it to be plural, it would be libraries.
Yes. Libraries is the plural form of the singular noun library
Yes, libraries is the plural form of the singular noun library.
It is usually used as the plural of person.Yes, the noun people is a plural noun; the singular is person. Examples:The people at the library were very helpful.The person at the library was very helpful.
The noun 'mice' is the plural form of the singular noun 'mouse'.
The singular noun is "louse" and the plural noun is "lice."
noun that are plural in form but singular in meaning
The noun children is the plural form of the singular noun child.
The noun 'circus' is a singular noun.The plural noun is 'circuses'.
The noun juggler is a singular noun. The plural noun is jugglers.
The singular noun is Tuesday.The plural noun is Tuesdays.
The singular noun is trio; the plural noun is trios.
The noun 'orchid' is a singular noun, a word for one.The plural noun is 'orchids'.