The noun 'aerobics' is an uncountable noun; an aggregate noun, a wordrepresenting an indefinite number of parts; aggregate nouns have no singular form.
um, you just wrote it
The noun 'aerobics' is an uncountable noun; an aggregate noun, a wordrepresenting an indefinite number of parts; aggregate nouns have no singular form.
The plural form of "do" is "do" and the plural form of "don't" is "don't." These words do not change in the plural form when used in a sentence.
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "was" is "were."
"Groceries" is the plural form of "grocery."
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
The plural form of "meter" is "meters."
The plural form of the demonstrative pronoun 'that' is those.
The plural form of "trench" is "trenches."
The plural form for the noun sergeant is sergeants; the plural possessive form is sergeants'.
It has no plural form.