The plural form for the noun ski, or any noun ending with -ski, is skis (-skis).
No, the plural form skis is a regular plural for the singular noun ski. A regular plural is a noun to which an -s or an -es is added to form the plural. An irregular plural is plurals formed in some other way.
No. Apostrophes are almost never used to form a plural.The spelling ski's is a possessive noun, e.g.He has to be careful of his left ski's position on the last turn.His right ski's color is black and his left ski's color is white.
ski
skisskis
It is calves.
ski
Yes, the noun 'rescue' is a count noun, the plural form is rescues.example: The ski patrol has made a number of rescues of adventurous skiers.
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 "is" is "are."