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 couldn't sit you couldn't sit he couldn't sit we couldn't sit you couldn't sit they couldn't sit	I couldn't be sitting you couldn't be sitting he couldn't be sitting we couldn't be sitting you couldn't be sitting they couldn't be sitting
Perfect	V-ing perfect
I couldn't have sat you couldn't have sat he couldn't have sat we couldn't have sat you couldn't have sat they couldn't have sat	I couldn't have been sitting you couldn't have been sitting he couldn't have been sitting we couldn't have been sitting you couldn't have been sitting they couldn't 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
couldn't I sit? couldn't you sit? couldn't he sit? couldn't we sit? couldn't you sit? couldn't they sit?	couldn't I be sitting? couldn't you be sitting? couldn't he be sitting? couldn't we be sitting? couldn't you be sitting? couldn't they be sitting?
Perfect	V-ing perfect
couldn't I have sat? couldn't you have sat? couldn't he have sat? couldn't we have sat? couldn't you have sat? couldn't they have sat?	couldn't I have been sitting? couldn't you have been sitting? couldn't he have been sitting? couldn't we have been sitting? couldn't you have been sitting? couldn't they have been sitting?