' uses

An apostrophe commonly marks possession or omitted letters in a contraction. It is not normally used to form a simple plural. Distinguishing these jobs helps prevent common errors such as confusing its and it’s.

Meaning and context

For a singular noun, an apostrophe plus s often marks possession: the teacher’s desk. For a regular plural ending in s, the apostrophe follows that s: the teachers’ room. Some names and special cases depend on the style guide being followed.

Examples and usage

It’s means it is or it has. Its is the possessive form, as in The book lost its cover. The ordinary plural books has no apostrophe. Read the expanded phrase to check a contraction: if it is does not fit, it’s probably does not belong.

What to check

Do not apply one pattern mechanically to every word ending in s. Irregular plurals and publication conventions can affect the result. When an exercise is unclear, first identify whether you mean ownership, missing letters, or simply more than one item.

Explore more: Word meanings and writing guides