could choke
Regular verb: choke - choked- choked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could choke
you could choke
he could choke
we could choke
you could choke
they could choke 	I could be choking
you could be choking
he could be choking
we could be choking
you could be choking
they could be choking	I could have choked
you could have choked
he could have choked
we could have choked
you could have choked
they could have choked	I could have been choking
you could have been choking
he could have been choking
we could have been choking
you could have been choking
they could have been choking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't choke
you couldn't choke
he couldn't choke
we couldn't choke
you couldn't choke
they couldn't choke 	I couldn't be choking
you couldn't be choking
he couldn't be choking
we couldn't be choking
you couldn't be choking
they couldn't be choking	I couldn't have choked
you couldn't have choked
he couldn't have choked
we couldn't have choked
you couldn't have choked
they couldn't have choked	I couldn't have been choking
you couldn't have been choking
he couldn't have been choking
we couldn't have been choking
you couldn't have been choking
they couldn't have been choking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I choke?
could you choke?
could he choke?
could we choke?
could you choke?
could they choke? 	could I be choking?
could you be choking?
could he be choking?
could we be choking?
could you be choking?
could they be choking? 	could I have choked?
could you have choked?
could he have choked?
could we have choked?
could you have choked?
could they have choked? 	could I have been choking?
could you have been choking?
could he have been choking?
could we have been choking?
could you have been choking?
could they have been choking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I choke?
couldn't you choke?
couldn't he choke?
couldn't we choke?
couldn't you choke?
couldn't they choke? 	couldn't I be choking?
couldn't you be choking?
couldn't he be choking?
couldn't we be choking?
couldn't you be choking?
couldn't they be choking? 	couldn't I have choked?
couldn't you have choked?
couldn't he have choked?
couldn't we have choked?
couldn't you have choked?
couldn't they have choked? 	couldn't I have been choking?
couldn't you have been choking?
couldn't he have been choking?
couldn't we have been choking?
couldn't you have been choking?
couldn't they have been choking?