could cartwheel
Regular verb: cartwheel - cartwheeled- cartwheeled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cartwheel
you could cartwheel
he could cartwheel
we could cartwheel
you could cartwheel
they could cartwheel 	I could be cartwheeling
you could be cartwheeling
he could be cartwheeling
we could be cartwheeling
you could be cartwheeling
they could be cartwheeling	I could have cartwheeled
you could have cartwheeled
he could have cartwheeled
we could have cartwheeled
you could have cartwheeled
they could have cartwheeled	I could have been cartwheeling
you could have been cartwheeling
he could have been cartwheeling
we could have been cartwheeling
you could have been cartwheeling
they could have been cartwheeling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cartwheel
you could not cartwheel
he could not cartwheel
we could not cartwheel
you could not cartwheel
they could not cartwheel 	I could not be cartwheeling
you could not be cartwheeling
he could not be cartwheeling
we could not be cartwheeling
you could not be cartwheeling
they could not be cartwheeling	I could not have cartwheeled
you could not have cartwheeled
he could not have cartwheeled
we could not have cartwheeled
you could not have cartwheeled
they could not have cartwheeled	I could not have been cartwheeling
you could not have been cartwheeling
he could not have been cartwheeling
we could not have been cartwheeling
you could not have been cartwheeling
they could not have been cartwheeling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cartwheel?
could you cartwheel?
could he cartwheel?
could we cartwheel?
could you cartwheel?
could they cartwheel? 	could I be cartwheeling?
could you be cartwheeling?
could he be cartwheeling?
could we be cartwheeling?
could you be cartwheeling?
could they be cartwheeling? 	could I have cartwheeled?
could you have cartwheeled?
could he have cartwheeled?
could we have cartwheeled?
could you have cartwheeled?
could they have cartwheeled? 	could I have been cartwheeling?
could you have been cartwheeling?
could he have been cartwheeling?
could we have been cartwheeling?
could you have been cartwheeling?
could they have been cartwheeling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cartwheel?
could you not cartwheel?
could he not cartwheel?
could we not cartwheel?
could you not cartwheel?
could they not cartwheel? 	could I not be cartwheeling?
could you not be cartwheeling?
could he not be cartwheeling?
could we not be cartwheeling?
could you not be cartwheeling?
could they not be cartwheeling? 	could I not have cartwheeled?
could you not have cartwheeled?
could he not have cartwheeled?
could we not have cartwheeled?
could you not have cartwheeled?
could they not have cartwheeled? 	could I not have been cartwheeling?
could you not have been cartwheeling?
could he not have been cartwheeling?
could we not have been cartwheeling?
could you not have been cartwheeling?
could they not have been cartwheeling?