could joint
Regular verb: joint - jointed- jointed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could joint
you could joint
he could joint
we could joint
you could joint
they could joint 	I could be jointing
you could be jointing
he could be jointing
we could be jointing
you could be jointing
they could be jointing	I could have jointed
you could have jointed
he could have jointed
we could have jointed
you could have jointed
they could have jointed	I could have been jointing
you could have been jointing
he could have been jointing
we could have been jointing
you could have been jointing
they could have been jointing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not joint
you could not joint
he could not joint
we could not joint
you could not joint
they could not joint 	I could not be jointing
you could not be jointing
he could not be jointing
we could not be jointing
you could not be jointing
they could not be jointing	I could not have jointed
you could not have jointed
he could not have jointed
we could not have jointed
you could not have jointed
they could not have jointed	I could not have been jointing
you could not have been jointing
he could not have been jointing
we could not have been jointing
you could not have been jointing
they could not have been jointing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I joint?
could you joint?
could he joint?
could we joint?
could you joint?
could they joint? 	could I be jointing?
could you be jointing?
could he be jointing?
could we be jointing?
could you be jointing?
could they be jointing? 	could I have jointed?
could you have jointed?
could he have jointed?
could we have jointed?
could you have jointed?
could they have jointed? 	could I have been jointing?
could you have been jointing?
could he have been jointing?
could we have been jointing?
could you have been jointing?
could they have been jointing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not joint?
could you not joint?
could he not joint?
could we not joint?
could you not joint?
could they not joint? 	could I not be jointing?
could you not be jointing?
could he not be jointing?
could we not be jointing?
could you not be jointing?
could they not be jointing? 	could I not have jointed?
could you not have jointed?
could he not have jointed?
could we not have jointed?
could you not have jointed?
could they not have jointed? 	could I not have been jointing?
could you not have been jointing?
could he not have been jointing?
could we not have been jointing?
could you not have been jointing?
could they not have been jointing?