I could rake you could rake she could rake we could rake you could rake they could rake
V-ing form
I could be raking you could be raking she could be raking we could be raking you could be raking they could be raking
Perfect
I could have raked you could have raked she could have raked we could have raked you could have raked they could have raked
V-ing perfect
I could have been raking you could have been raking she could have been raking we could have been raking you could have been raking they could have been raking
Negation
Simple form
I could not rake you could not rake she could not rake we could not rake you could not rake they could not rake
V-ing form
I could not be raking you could not be raking she could not be raking we could not be raking you could not be raking they could not be raking
Perfect
I could not have raked you could not have raked she could not have raked we could not have raked you could not have raked they could not have raked
V-ing perfect
I could not have been raking you could not have been raking she could not have been raking we could not have been raking you could not have been raking they could not have been raking
Interrogative form
Simple form
could I rake? could you rake? could she rake? could we rake? could you rake? could they rake?
V-ing form
could I be raking? could you be raking? could she be raking? could we be raking? could you be raking? could they be raking?
Perfect
could I have raked? could you have raked? could she have raked? could we have raked? could you have raked? could they have raked?
V-ing perfect
could I have been raking? could you have been raking? could she have been raking? could we have been raking? could you have been raking? could they have been raking?
Interro-negative form
Simple form
could I not rake? could you not rake? could she not rake? could we not rake? could you not rake? could they not rake?
V-ing form
could I not be raking? could you not be raking? could she not be raking? could we not be raking? could you not be raking? could they not be raking?
Perfect
could I not have raked? could you not have raked? could she not have raked? could we not have raked? could you not have raked? could they not have raked?
V-ing perfect
could I not have been raking? could you not have been raking? could she not have been raking? could we not have been raking? could you not have been raking? could they not have been raking?