In most cases an apostrophe is used to show possession. In such cases, one noun will always be followed by another noun, i.e., the one it possesses.

Do you use a to show possession?

Apostrophes show possession. To show possession with a singular noun, you simply add an apostrophe plus the letter 's. ... Be careful not to add apostrophes to plural nouns that don't show ownership. Apple's are $0.25 each.

How do you indicate possession?

Explanation: An apostrophe and the letter 's' are used to show possession.It is important to put the apostrophe in the correct place, either before the 's' or after the 's', depending on whether the subject is singular or plural.