What is the past tense of quit?

The past tense of quit is quit.

Quit is unchanged in the past tense.

All forms of quit

as a verb

base: quit
past tense: quit
past participle: quit
present participle: quitting
third-person singular: quits

Quit in a sentence

As she's quit drinking, she's lost some weight.unknown
Now that she has quit her job, we can't depend on her.CK
If you quit the job, you'll be burning your bridges.unknown