English verb conjugation
COULD ENTER STH

Regular verb: enter sth - enter sthed - enter sthed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I could enter sth you could enter sth she could enter sth we could enter sth you could enter sth they could enter sth	I could be enter sthing you could be enter sthing she could be enter sthing we could be enter sthing you could be enter sthing they could be enter sthing
Perfect	V-ing perfect
I could have enter sthed you could have enter sthed she could have enter sthed we could have enter sthed you could have enter sthed they could have enter sthed	I could have been enter sthing you could have been enter sthing she could have been enter sthing we could have been enter sthing you could have been enter sthing they could have been enter sthing

Negation

Simple form	V-ing form
I could not enter sth you could not enter sth she could not enter sth we could not enter sth you could not enter sth they could not enter sth	I could not be enter sthing you could not be enter sthing she could not be enter sthing we could not be enter sthing you could not be enter sthing they could not be enter sthing
Perfect	V-ing perfect
I could not have enter sthed you could not have enter sthed she could not have enter sthed we could not have enter sthed you could not have enter sthed they could not have enter sthed	I could not have been enter sthing you could not have been enter sthing she could not have been enter sthing we could not have been enter sthing you could not have been enter sthing they could not have been enter sthing

Interrogative form

Simple form	V-ing form
could I enter sth? could you enter sth? could she enter sth? could we enter sth? could you enter sth? could they enter sth?	could I be enter sthing? could you be enter sthing? could she be enter sthing? could we be enter sthing? could you be enter sthing? could they be enter sthing?
Perfect	V-ing perfect
could I have enter sthed? could you have enter sthed? could she have enter sthed? could we have enter sthed? could you have enter sthed? could they have enter sthed?	could I have been enter sthing? could you have been enter sthing? could she have been enter sthing? could we have been enter sthing? could you have been enter sthing? could they have been enter sthing?

Interro-negative form

Simple form	V-ing form
could I not enter sth? could you not enter sth? could she not enter sth? could we not enter sth? could you not enter sth? could they not enter sth?	could I not be enter sthing? could you not be enter sthing? could she not be enter sthing? could we not be enter sthing? could you not be enter sthing? could they not be enter sthing?
Perfect	V-ing perfect
could I not have enter sthed? could you not have enter sthed? could she not have enter sthed? could we not have enter sthed? could you not have enter sthed? could they not have enter sthed?	could I not have been enter sthing? could you not have been enter sthing? could she not have been enter sthing? could we not have been enter sthing? could you not have been enter sthing? could they not have been enter sthing?