could swivel
Regular verb: swivel - swivelled- swivelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could swivel
you could swivel
he could swivel
we could swivel
you could swivel
they could swivel 	I could be swivelling
you could be swivelling
he could be swivelling
we could be swivelling
you could be swivelling
they could be swivelling	I could have swivelled
you could have swivelled
he could have swivelled
we could have swivelled
you could have swivelled
they could have swivelled	I could have been swivelling
you could have been swivelling
he could have been swivelling
we could have been swivelling
you could have been swivelling
they could have been swivelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not swivel
you could not swivel
he could not swivel
we could not swivel
you could not swivel
they could not swivel 	I could not be swivelling
you could not be swivelling
he could not be swivelling
we could not be swivelling
you could not be swivelling
they could not be swivelling	I could not have swivelled
you could not have swivelled
he could not have swivelled
we could not have swivelled
you could not have swivelled
they could not have swivelled	I could not have been swivelling
you could not have been swivelling
he could not have been swivelling
we could not have been swivelling
you could not have been swivelling
they could not have been swivelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I swivel?
could you swivel?
could he swivel?
could we swivel?
could you swivel?
could they swivel? 	could I be swivelling?
could you be swivelling?
could he be swivelling?
could we be swivelling?
could you be swivelling?
could they be swivelling? 	could I have swivelled?
could you have swivelled?
could he have swivelled?
could we have swivelled?
could you have swivelled?
could they have swivelled? 	could I have been swivelling?
could you have been swivelling?
could he have been swivelling?
could we have been swivelling?
could you have been swivelling?
could they have been swivelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not swivel?
could you not swivel?
could he not swivel?
could we not swivel?
could you not swivel?
could they not swivel? 	could I not be swivelling?
could you not be swivelling?
could he not be swivelling?
could we not be swivelling?
could you not be swivelling?
could they not be swivelling? 	could I not have swivelled?
could you not have swivelled?
could he not have swivelled?
could we not have swivelled?
could you not have swivelled?
could they not have swivelled? 	could I not have been swivelling?
could you not have been swivelling?
could he not have been swivelling?
could we not have been swivelling?
could you not have been swivelling?
could they not have been swivelling?