I could commutate you could commutate she could commutate we could commutate you could commutate they could commutate
V-ing form
I could be commutating you could be commutating she could be commutating we could be commutating you could be commutating they could be commutating
Perfect
I could have commutated you could have commutated she could have commutated we could have commutated you could have commutated they could have commutated
V-ing perfect
I could have been commutating you could have been commutating she could have been commutating we could have been commutating you could have been commutating they could have been commutating
Negation
Simple form
I could not commutate you could not commutate she could not commutate we could not commutate you could not commutate they could not commutate
V-ing form
I could not be commutating you could not be commutating she could not be commutating we could not be commutating you could not be commutating they could not be commutating
Perfect
I could not have commutated you could not have commutated she could not have commutated we could not have commutated you could not have commutated they could not have commutated
V-ing perfect
I could not have been commutating you could not have been commutating she could not have been commutating we could not have been commutating you could not have been commutating they could not have been commutating
Interrogative form
Simple form
could I commutate? could you commutate? could she commutate? could we commutate? could you commutate? could they commutate?
V-ing form
could I be commutating? could you be commutating? could she be commutating? could we be commutating? could you be commutating? could they be commutating?
Perfect
could I have commutated? could you have commutated? could she have commutated? could we have commutated? could you have commutated? could they have commutated?
V-ing perfect
could I have been commutating? could you have been commutating? could she have been commutating? could we have been commutating? could you have been commutating? could they have been commutating?
Interro-negative form
Simple form
could I not commutate? could you not commutate? could she not commutate? could we not commutate? could you not commutate? could they not commutate?
V-ing form
could I not be commutating? could you not be commutating? could she not be commutating? could we not be commutating? could you not be commutating? could they not be commutating?
Perfect
could I not have commutated? could you not have commutated? could she not have commutated? could we not have commutated? could you not have commutated? could they not have commutated?
V-ing perfect
could I not have been commutating? could you not have been commutating? could she not have been commutating? could we not have been commutating? could you not have been commutating? could they not have been commutating?