could assign
Regular verb: assign - assigned- assigned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could assign
you could assign
he could assign
we could assign
you could assign
they could assign 	I could be assigning
you could be assigning
he could be assigning
we could be assigning
you could be assigning
they could be assigning	I could have assigned
you could have assigned
he 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
he 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
he 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
he 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
he 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
he 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 he assign?
could we assign?
could you assign?
could they assign? 	could I be assigning?
could you be assigning?
could he be assigning?
could we be assigning?
could you be assigning?
could they be assigning? 	could I have assigned?
could you have assigned?
could he 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 he 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 he 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 he 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 he 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 he have been assigning?
couldn't we have been assigning?
couldn't you have been assigning?
couldn't they have been assigning?