The two primary reasons to use an apostrophe are within:
I can't believe John's collection was stolen.
When you select it, it removes every apostrophe in the story.
A contraction is made of two words with an apostrophe. Note the apostrophe replaces a letter.
The contraction of 'will not' is won't.
You only use an apostrophe in it's when it is a contraction of it is. If you are using ITS to describe something belonging to IT, such as "It was wagging its tail," then the tail belongs to it and so its does not have an apostrophe.
A noun that shows ownership using an apostrophe is a possessive noun.
If the word is singular then you put the apostrophe before the s. If it is plural then put it after the s. A word does no have a apostrophe in the possessive if it is a pronoun, example: his or hers.
When you select it, it removes every apostrophe in the story.
Neither. The apostrophe is not used with a plural. This is a common mistake.It is not even correct to make the plural numbers using an apostrophe. For example, it is not correct to write the 1980's, but the correct form is the 1980s.
If the plural noun has possession, indicate it by using an apostrophe after the S.
No, only use an apostrophe when using a contraction or a possessive
A contraction is made of two words with an apostrophe. Note the apostrophe replaces a letter.
The contraction of 'will not' is won't.
You only use an apostrophe in it's when it is a contraction of it is. If you are using ITS to describe something belonging to IT, such as "It was wagging its tail," then the tail belongs to it and so its does not have an apostrophe.
A noun that shows ownership using an apostrophe is a possessive noun.
No, unless your name has an apostrophe in it or you are using it in the possessive.
It is indicated by using an apostrophe.
If you are indicating possession (Achilles' heal) use an apostrophe at the end of the word. If you are simply stating his name, there is no apostrophe.