What is a contraction for words?

A contraction is a shortened form of a word or group of words, created by combining two words and removing some letters, usually a vowel.

Here are some examples:

* can't (cannot)

* don't (do not)

* it's (it is)

* I'm (I am)

* they're (they are)

* she's (she is)

* he'll (he will)

* we've (we have)

* I'd (I would)

Contractions are commonly used in informal writing and speech, but they should be used carefully in formal writing, as they can sometimes be considered too casual.