I could fry you could fry she could fry we could fry you could fry they could fry
V-ing form
I could be frying you could be frying she could be frying we could be frying you could be frying they could be frying
Perfect
I could have fried you could have fried she could have fried we could have fried you could have fried they could have fried
V-ing perfect
I could have been frying you could have been frying she could have been frying we could have been frying you could have been frying they could have been frying
Negation
Simple form
I could not fry you could not fry she could not fry we could not fry you could not fry they could not fry
V-ing form
I could not be frying you could not be frying she could not be frying we could not be frying you could not be frying they could not be frying
Perfect
I could not have fried you could not have fried she could not have fried we could not have fried you could not have fried they could not have fried
V-ing perfect
I could not have been frying you could not have been frying she could not have been frying we could not have been frying you could not have been frying they could not have been frying
Interrogative form
Simple form
could I fry? could you fry? could she fry? could we fry? could you fry? could they fry?
V-ing form
could I be frying? could you be frying? could she be frying? could we be frying? could you be frying? could they be frying?
Perfect
could I have fried? could you have fried? could she have fried? could we have fried? could you have fried? could they have fried?
V-ing perfect
could I have been frying? could you have been frying? could she have been frying? could we have been frying? could you have been frying? could they have been frying?
Interro-negative form
Simple form
could I not fry? could you not fry? could she not fry? could we not fry? could you not fry? could they not fry?
V-ing form
could I not be frying? could you not be frying? could she not be frying? could we not be frying? could you not be frying? could they not be frying?
Perfect
could I not have fried? could you not have fried? could she not have fried? could we not have fried? could you not have fried? could they not have fried?
V-ing perfect
could I not have been frying? could you not have been frying? could she not have been frying? could we not have been frying? could you not have been frying? could they not have been frying?