could ok
Regular verb: ok - oked- oked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ok
you could ok
she could ok
we could ok
you could ok
they could ok 	I could be oking
you could be oking
she could be oking
we could be oking
you could be oking
they could be oking	I could have oked
you could have oked
she could have oked
we could have oked
you could have oked
they could have oked	I could have been oking
you could have been oking
she could have been oking
we could have been oking
you could have been oking
they could have been oking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not ok
you could not ok
she could not ok
we could not ok
you could not ok
they could not ok 	I could not be oking
you could not be oking
she could not be oking
we could not be oking
you could not be oking
they could not be oking	I could not have oked
you could not have oked
she could not have oked
we could not have oked
you could not have oked
they could not have oked	I could not have been oking
you could not have been oking
she could not have been oking
we could not have been oking
you could not have been oking
they could not have been oking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ok?
could you ok?
could she ok?
could we ok?
could you ok?
could they ok? 	could I be oking?
could you be oking?
could she be oking?
could we be oking?
could you be oking?
could they be oking? 	could I have oked?
could you have oked?
could she have oked?
could we have oked?
could you have oked?
could they have oked? 	could I have been oking?
could you have been oking?
could she have been oking?
could we have been oking?
could you have been oking?
could they have been oking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not ok?
could you not ok?
could she not ok?
could we not ok?
could you not ok?
could they not ok? 	could I not be oking?
could you not be oking?
could she not be oking?
could we not be oking?
could you not be oking?
could they not be oking? 	could I not have oked?
could you not have oked?
could she not have oked?
could we not have oked?
could you not have oked?
could they not have oked? 	could I not have been oking?
could you not have been oking?
could she not have been oking?
could we not have been oking?
could you not have been oking?
could they not have been oking?