Instances.
the word 'sheep' remains the same in singular or plural form, for instance: "there is a sheep" "there are some sheep"
Change is singular, not plural. The plural form is changes.
"Change" can be both singular and plural. It is singular when referring to a single instance of alteration or modification. It is plural when referring to multiple instances of alteration or money in the form of smaller denominations.
Yes, some nouns have the same form for singular and plural, for example:one deer, two deeraircraftsalmontroutsheepswineoffspringpoliceAnother group of nouns are the binary nouns, words that are a shortened form for 'a pair of', for example:one pair of glasses, two pairs of glassesbinocularspantsjeansshortsscissorstweezerstongs
"Crosses" is the plural form of "cross." It refers to more than one cross. In contrast, "cross" is singular and denotes just one instance of that object.
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."
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.