there isnt a plural form of a.
The plural form is challenges.
Arguments is in the plural form for the singular noun argument.
"Daffodils" is the plural of "daffodil."
The plural form is digits; the singular form is digit.
Santalum acuminatum was created in 1810.
Myoporum acuminatum was created in 1810.
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.
"Beliefs" does not have a plural form, as it is already plural. Beliefs is the plural form of belief.
"Groceries" is the plural form of "grocery."
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.