Contractions in English, Contractions With Auxiliary Verb and Not in English;
| Auxiliary Verbs | Not | Contractions | |
| am | + | not | I’m not |
| is | + | not | isn’t |
| are | + | not | aren’t |
| was | + | not | wasn’t |
| were | + | not | weren’t |
| has | + | not | hasn’t |
| have | + | not | haven’t |
| had | + | not | hadn’t |
| do | + | not | don’t |
| does | + | not | doesn’t |
| did | + | not | didn’t |
| will | + | not | won’t |
| would | + | not | wouldn’t |
| shall | + | not | shan’t |
| can | + | not | can’t |
| could | + | not | couldn’t |
| may | + | not | mayn’t |
| might | + | not | mightn’t |
| should | + | not | shouldn’t |
| must | + | not | mustn’t |
| need | + | not | needn’t |
| ought | + | not | oughtn’t |
| dare | + | not | daren’t |
