could don
Regular verb: don - donned- donned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could don
you could don
he could don
we could don
you could don
they could don 	I could be donning
you could be donning
he could be donning
we could be donning
you could be donning
they could be donning	I could have donned
you could have donned
he could have donned
we could have donned
you could have donned
they could have donned	I could have been donning
you could have been donning
he could have been donning
we could have been donning
you could have been donning
they could have been donning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't don
you couldn't don
he couldn't don
we couldn't don
you couldn't don
they couldn't don 	I couldn't be donning
you couldn't be donning
he couldn't be donning
we couldn't be donning
you couldn't be donning
they couldn't be donning	I couldn't have donned
you couldn't have donned
he couldn't have donned
we couldn't have donned
you couldn't have donned
they couldn't have donned	I couldn't have been donning
you couldn't have been donning
he couldn't have been donning
we couldn't have been donning
you couldn't have been donning
they couldn't have been donning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I don?
could you don?
could he don?
could we don?
could you don?
could they don? 	could I be donning?
could you be donning?
could he be donning?
could we be donning?
could you be donning?
could they be donning? 	could I have donned?
could you have donned?
could he have donned?
could we have donned?
could you have donned?
could they have donned? 	could I have been donning?
could you have been donning?
could he have been donning?
could we have been donning?
could you have been donning?
could they have been donning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I don?
couldn't you don?
couldn't he don?
couldn't we don?
couldn't you don?
couldn't they don? 	couldn't I be donning?
couldn't you be donning?
couldn't he be donning?
couldn't we be donning?
couldn't you be donning?
couldn't they be donning? 	couldn't I have donned?
couldn't you have donned?
couldn't he have donned?
couldn't we have donned?
couldn't you have donned?
couldn't they have donned? 	couldn't I have been donning?
couldn't you have been donning?
couldn't he have been donning?
couldn't we have been donning?
couldn't you have been donning?
couldn't they have been donning?