could whip
Regular verb: whip - whipped- whipped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could whip
you could whip
he could whip
we could whip
you could whip
they could whip 	I could be whipping
you could be whipping
he could be whipping
we could be whipping
you could be whipping
they could be whipping	I could have whipped
you could have whipped
he could have whipped
we could have whipped
you could have whipped
they could have whipped	I could have been whipping
you could have been whipping
he could have been whipping
we could have been whipping
you could have been whipping
they could have been whipping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't whip
you couldn't whip
he couldn't whip
we couldn't whip
you couldn't whip
they couldn't whip 	I couldn't be whipping
you couldn't be whipping
he couldn't be whipping
we couldn't be whipping
you couldn't be whipping
they couldn't be whipping	I couldn't have whipped
you couldn't have whipped
he couldn't have whipped
we couldn't have whipped
you couldn't have whipped
they couldn't have whipped	I couldn't have been whipping
you couldn't have been whipping
he couldn't have been whipping
we couldn't have been whipping
you couldn't have been whipping
they couldn't have been whipping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I whip?
could you whip?
could he whip?
could we whip?
could you whip?
could they whip? 	could I be whipping?
could you be whipping?
could he be whipping?
could we be whipping?
could you be whipping?
could they be whipping? 	could I have whipped?
could you have whipped?
could he have whipped?
could we have whipped?
could you have whipped?
could they have whipped? 	could I have been whipping?
could you have been whipping?
could he have been whipping?
could we have been whipping?
could you have been whipping?
could they have been whipping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I whip?
couldn't you whip?
couldn't he whip?
couldn't we whip?
couldn't you whip?
couldn't they whip? 	couldn't I be whipping?
couldn't you be whipping?
couldn't he be whipping?
couldn't we be whipping?
couldn't you be whipping?
couldn't they be whipping? 	couldn't I have whipped?
couldn't you have whipped?
couldn't he have whipped?
couldn't we have whipped?
couldn't you have whipped?
couldn't they have whipped? 	couldn't I have been whipping?
couldn't you have been whipping?
couldn't he have been whipping?
couldn't we have been whipping?
couldn't you have been whipping?
couldn't they have been whipping?