So I saw that "shutted" isn't an English word, but "I shut up" doesn't sound proper.
If you were to tell someone "I shut up", talking in past tense, would that be proper?
English Language & Usage Stack Exchange is a question and answer site for linguists, etymologists, and serious English language enthusiasts. It only takes a minute to sign up.Sign up to join this community
Yes it is correct. It probably sounds peculiar because it is the same as present tense. You can avoid confusion regarding tense if you say, for instance:
I shut up when [somebody] [did something].
There are many English verbs (such as cut, put, cast, etc.) whose past tense and past participle are the same as present first-person.
shut [shut] v (past shut, past participle shut, present participle shut·ting, 3rd person present singular shuts)
shut up would be the past tense. like read is the past tense of read.
Shut up is most often used in the imperative though, which doesn't have a past tense obviously.
So I shut up sounds good
If you have a look at this link we can find shut-upped is a word too