I could creep you could creep she could creep we could creep you could creep they could creep
V-ing form
I could be creeping you could be creeping she could be creeping we could be creeping you could be creeping they could be creeping
Perfect
I could have crept you could have crept she could have crept we could have crept you could have crept they could have crept
V-ing perfect
I could have been creeping you could have been creeping she could have been creeping we could have been creeping you could have been creeping they could have been creeping
Negation
Simple form
I could not creep you could not creep she could not creep we could not creep you could not creep they could not creep
V-ing form
I could not be creeping you could not be creeping she could not be creeping we could not be creeping you could not be creeping they could not be creeping
Perfect
I could not have crept you could not have crept she could not have crept we could not have crept you could not have crept they could not have crept
V-ing perfect
I could not have been creeping you could not have been creeping she could not have been creeping we could not have been creeping you could not have been creeping they could not have been creeping
Interrogative form
Simple form
could I creep? could you creep? could she creep? could we creep? could you creep? could they creep?
V-ing form
could I be creeping? could you be creeping? could she be creeping? could we be creeping? could you be creeping? could they be creeping?
Perfect
could I have crept? could you have crept? could she have crept? could we have crept? could you have crept? could they have crept?
V-ing perfect
could I have been creeping? could you have been creeping? could she have been creeping? could we have been creeping? could you have been creeping? could they have been creeping?
Interro-negative form
Simple form
could I not creep? could you not creep? could she not creep? could we not creep? could you not creep? could they not creep?
V-ing form
could I not be creeping? could you not be creeping? could she not be creeping? could we not be creeping? could you not be creeping? could they not be creeping?
Perfect
could I not have crept? could you not have crept? could she not have crept? could we not have crept? could you not have crept? could they not have crept?
V-ing perfect
could I not have been creeping? could you not have been creeping? could she not have been creeping? could we not have been creeping? could you not have been creeping? could they not have been creeping?