Contraction (grammar) in User Interface

1. What is contractions in grammar?
2. Are contractions one or two words?

What is contractions in grammar?

Contractions are a unique type of word that combines two or more other words in a shortened form, usually with an apostrophe. Contractions take words that usually go together, like can not or I have, and then remove certain letters to shorten them and make other words, like can't or I've.

Are contractions one or two words?

A contraction is a word made by shortening and combining two words. Words like can't (can + not), don't (do + not), and I've (I + have) are all contractions. People use contractions in both speaking and writing.