The noun 'filly' is a word for a female horse. It is correct to use either the pronouns for a female 'she' and 'her', or the neutral 'it' and 'they'. Examples:
I like your new filly, she is so beautiful.
I like your new filly, it is so beautiful.
The plural of the proper noun Philly is Phillies. (As a nickname for Philadelphia, it has no plural.) The plural of the common noun filly (young female horse) is fillies.
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.
There is no plural form for the word, countries. This word itself is a plural.
The plural of "she" is "they", so the plural of "she had" is "they had".
The plural of the proper noun Philly is Phillies. (As a nickname for Philadelphia, it has no plural.) The plural of the common noun filly (young female horse) is fillies.
Filly is a young female horse, but it has no other form. A colt is used to describe a young male horse.
Calf or the plural form calves if there are more than one .
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."
"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 mouth is mouths. The plural form of month is months. The Mounth is a range of hills in Scotland and does not have a plural form.