Singular. Plural is: they are, have and do.
Derogatory is an adjective, and has no plural forms.
There are two accepted forms of the noun: adviser and advisor.The plural forms are advisers and advisors.
The plural forms of the noun executrix are executrices or executrixes, both forms are accepted.
proofreaders
The plural form of the noun owner is owners.The plural possessive form is owners'.Example: The land owners' meeting made a decision on access rights.
Are is a plural present be verb. We are walking home. Were is a plural past be verb. They were looking for me. Have is a plural main verb or auxiliary verb. They have a dog. They have had a dog for years.
The term 'lovely looking' is a combination of adjectives; adjectives do not have a possessive form. Nouns and pronouns are the words that have possessive forms.
The forms for the adjective forward are: positive: forward comparative: more forward superlative: most forward
There are two accepted forms of the noun: adviser and advisor.The plural forms are advisers and advisors.The plural possessive forms are advisers' and advisors'.
Verbs don't have plural forms.
plural forms are uteri or uteruses.
There are two accepted plural forms of the noun vertex: vertices and vertexes.The plural possessive forms are vertices' and vertexes'.
The plural forms for the singular lumen is lumina or lumens, both are accepted plural forms.
There are two accepted plural forms for the noun cargo, they are cargoes and cargos.The plural possessive forms are cargoes' and cargos'.
The plural form of thesaurus is "thesauruses" or "thesauri."
German plural forms are formed irregularly.