could assign
Regular verb: assign - assigned- assigned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could assign
you could assign
she could assign
we could assign
you could assign
they could assign 	I could be assigning
you could be assigning
she could be assigning
we could be assigning
you could be assigning
they could be assigning	I could have assigned
you could have assigned
she could have assigned
we could have assigned
you could have assigned
they could have assigned	I could have been assigning
you could have been assigning
she could have been assigning
we could have been assigning
you could have been assigning
they could have been assigning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't assign
you couldn't assign
she couldn't assign
we couldn't assign
you couldn't assign
they couldn't assign 	I couldn't be assigning
you couldn't be assigning
she couldn't be assigning
we couldn't be assigning
you couldn't be assigning
they couldn't be assigning	I couldn't have assigned
you couldn't have assigned
she couldn't have assigned
we couldn't have assigned
you couldn't have assigned
they couldn't have assigned	I couldn't have been assigning
you couldn't have been assigning
she couldn't have been assigning
we couldn't have been assigning
you couldn't have been assigning
they couldn't have been assigning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I assign?
could you assign?
could she assign?
could we assign?
could you assign?
could they assign? 	could I be assigning?
could you be assigning?
could she be assigning?
could we be assigning?
could you be assigning?
could they be assigning? 	could I have assigned?
could you have assigned?
could she have assigned?
could we have assigned?
could you have assigned?
could they have assigned? 	could I have been assigning?
could you have been assigning?
could she have been assigning?
could we have been assigning?
could you have been assigning?
could they have been assigning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I assign?
couldn't you assign?
couldn't she assign?
couldn't we assign?
couldn't you assign?
couldn't they assign? 	couldn't I be assigning?
couldn't you be assigning?
couldn't she be assigning?
couldn't we be assigning?
couldn't you be assigning?
couldn't they be assigning? 	couldn't I have assigned?
couldn't you have assigned?
couldn't she have assigned?
couldn't we have assigned?
couldn't you have assigned?
couldn't they have assigned? 	couldn't I have been assigning?
couldn't you have been assigning?
couldn't she have been assigning?
couldn't we have been assigning?
couldn't you have been assigning?
couldn't they have been assigning?