English verb conjugation
COULD SIT

Irregular verb: sit - sat - sat

Affirmation

Simple form	V-ing form
I could sit you could sit he could sit we could sit you could sit they could sit	I could be sitting you could be sitting he could be sitting we could be sitting you could be sitting they could be sitting
Perfect	V-ing perfect
I could have sat you could have sat he could have sat we could have sat you could have sat they could have sat	I could have been sitting you could have been sitting he could have been sitting we could have been sitting you could have been sitting they could have been sitting

Negation

Simple form	V-ing form
I could not sit you could not sit he could not sit we could not sit you could not sit they could not sit	I could not be sitting you could not be sitting he could not be sitting we could not be sitting you could not be sitting they could not be sitting
Perfect	V-ing perfect
I could not have sat you could not have sat he could not have sat we could not have sat you could not have sat they could not have sat	I could not have been sitting you could not have been sitting he could not have been sitting we could not have been sitting you could not have been sitting they could not have been sitting

Interrogative form

Simple form	V-ing form
could I sit? could you sit? could he sit? could we sit? could you sit? could they sit?	could I be sitting? could you be sitting? could he be sitting? could we be sitting? could you be sitting? could they be sitting?
Perfect	V-ing perfect
could I have sat? could you have sat? could he have sat? could we have sat? could you have sat? could they have sat?	could I have been sitting? could you have been sitting? could he have been sitting? could we have been sitting? could you have been sitting? could they have been sitting?

Interro-negative form

Simple form	V-ing form
could I not sit? could you not sit? could he not sit? could we not sit? could you not sit? could they not sit?	could I not be sitting? could you not be sitting? could he not be sitting? could we not be sitting? could you not be sitting? could they not be sitting?
Perfect	V-ing perfect
could I not have sat? could you not have sat? could he not have sat? could we not have sat? could you not have sat? could they not have sat?	could I not have been sitting? could you not have been sitting? could he not have been sitting? could we not have been sitting? could you not have been sitting? could they not have been sitting?