What is the correct way to use an apostrophe in a sentence?

Question

In grammar, apostrophes have a very important part to play when writing sentences. It is very important to understand the different rules of using an apostrophe correctly in words when writing a sentence.

Answer 1

In grammar/writing, an apostrophe represents two main ideas: possession and contraction.

1. Contraction: to show the omission of one or more letters in a contraction (examples: "it is = it's" or "do not = don't")
2. Possession: to show ownership or singular possession of a noun (examples: "a boy's toy" or "the mom's purse")
3. Possession: when nouns end with the letter "s" you can show ownership two ways: either by adding 's or s' (examples: "the boss's rules" or "Mr Greens' pen")

Answer 2

An apostrophe's primary use is to indicate possession.

Just apostrophize the noun's end if it already ends in "s" and it is plural.

When two nouns jointly own something, such as Lara and Alice's car, use an apostrophe. (The automobile is owned by both Lara and Alice)

Apostrophes' primary use in words is to fill in for missing letters.

Contractions Are Created Using Apostrophes eg. I've I have

Apostrophes may also be used to indicate plural lowercase characters or digits.

I added too many a's to the "Happy Birthday" sign.

In 2022, how many 2's are there?