It used to be "catalogue". However, "catalog" has become an acceptable alternative.
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".
No, "catalogs" is not singular possessive. Singular possessive would be "catalog's" with an apostrophe before the "s" at the end.
Cataloges
An inner form of catalog shows the arrangement of the card catalog. It is for the order that entries are arranged in the catalog.
It used to be "catalogue". However, "catalog" has become an acceptable alternative.
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."
The plural form of "I" is "we."
The plural form of "is" is "are."
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.
"Groceries" is the plural form of "grocery."