could dog-paddle
Regular verb: dog-paddle - dog-paddled- dog-paddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dog-paddle
you could dog-paddle
he could dog-paddle
we could dog-paddle
you could dog-paddle
they could dog-paddle 	I could be dog-paddling
you could be dog-paddling
he could be dog-paddling
we could be dog-paddling
you could be dog-paddling
they could be dog-paddling	I could have dog-paddled
you could have dog-paddled
he could have dog-paddled
we could have dog-paddled
you could have dog-paddled
they could have dog-paddled	I could have been dog-paddling
you could have been dog-paddling
he could have been dog-paddling
we could have been dog-paddling
you could have been dog-paddling
they could have been dog-paddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not dog-paddle
you could not dog-paddle
he could not dog-paddle
we could not dog-paddle
you could not dog-paddle
they could not dog-paddle 	I could not be dog-paddling
you could not be dog-paddling
he could not be dog-paddling
we could not be dog-paddling
you could not be dog-paddling
they could not be dog-paddling	I could not have dog-paddled
you could not have dog-paddled
he could not have dog-paddled
we could not have dog-paddled
you could not have dog-paddled
they could not have dog-paddled	I could not have been dog-paddling
you could not have been dog-paddling
he could not have been dog-paddling
we could not have been dog-paddling
you could not have been dog-paddling
they could not have been dog-paddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dog-paddle?
could you dog-paddle?
could he dog-paddle?
could we dog-paddle?
could you dog-paddle?
could they dog-paddle? 	could I be dog-paddling?
could you be dog-paddling?
could he be dog-paddling?
could we be dog-paddling?
could you be dog-paddling?
could they be dog-paddling? 	could I have dog-paddled?
could you have dog-paddled?
could he have dog-paddled?
could we have dog-paddled?
could you have dog-paddled?
could they have dog-paddled? 	could I have been dog-paddling?
could you have been dog-paddling?
could he have been dog-paddling?
could we have been dog-paddling?
could you have been dog-paddling?
could they have been dog-paddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not dog-paddle?
could you not dog-paddle?
could he not dog-paddle?
could we not dog-paddle?
could you not dog-paddle?
could they not dog-paddle? 	could I not be dog-paddling?
could you not be dog-paddling?
could he not be dog-paddling?
could we not be dog-paddling?
could you not be dog-paddling?
could they not be dog-paddling? 	could I not have dog-paddled?
could you not have dog-paddled?
could he not have dog-paddled?
could we not have dog-paddled?
could you not have dog-paddled?
could they not have dog-paddled? 	could I not have been dog-paddling?
could you not have been dog-paddling?
could he not have been dog-paddling?
could we not have been dog-paddling?
could you not have been dog-paddling?
could they not have been dog-paddling?