Allies.
Parentheses IS the plural form. The singular is parenthesis.
The plural form for the noun parenthesis is parentheses.
The plural form for the noun alto is altos. The plural possessive form is altos'.Example: The altos' rehearsal is scheduled for Friday.
Problem is singular, not plural. The plural form is problems.
The plural form of bracket is brackets.
Allies.
Ally is singular. Allies means more than one Ally.
Ally is the singular form. Allies is plural, (more than one).
The plural is valleys.Unlike nouns ending in -y (ally, spy), English nouns ending in -ay or -ey form regular S plurals.
Allies.
One alley, two alleysIt is spelled a l l e y sHope that helped :)
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."