could matriculate
Regular verb: matriculate - matriculated- matriculated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could matriculate
you could matriculate
he could matriculate
we could matriculate
you could matriculate
they could matriculate 	I could be matriculating
you could be matriculating
he could be matriculating
we could be matriculating
you could be matriculating
they could be matriculating	I could have matriculated
you could have matriculated
he could have matriculated
we could have matriculated
you could have matriculated
they could have matriculated	I could have been matriculating
you could have been matriculating
he could have been matriculating
we could have been matriculating
you could have been matriculating
they could have been matriculating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't matriculate
you couldn't matriculate
he couldn't matriculate
we couldn't matriculate
you couldn't matriculate
they couldn't matriculate 	I couldn't be matriculating
you couldn't be matriculating
he couldn't be matriculating
we couldn't be matriculating
you couldn't be matriculating
they couldn't be matriculating	I couldn't have matriculated
you couldn't have matriculated
he couldn't have matriculated
we couldn't have matriculated
you couldn't have matriculated
they couldn't have matriculated	I couldn't have been matriculating
you couldn't have been matriculating
he couldn't have been matriculating
we couldn't have been matriculating
you couldn't have been matriculating
they couldn't have been matriculating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I matriculate?
could you matriculate?
could he matriculate?
could we matriculate?
could you matriculate?
could they matriculate? 	could I be matriculating?
could you be matriculating?
could he be matriculating?
could we be matriculating?
could you be matriculating?
could they be matriculating? 	could I have matriculated?
could you have matriculated?
could he have matriculated?
could we have matriculated?
could you have matriculated?
could they have matriculated? 	could I have been matriculating?
could you have been matriculating?
could he have been matriculating?
could we have been matriculating?
could you have been matriculating?
could they have been matriculating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I matriculate?
couldn't you matriculate?
couldn't he matriculate?
couldn't we matriculate?
couldn't you matriculate?
couldn't they matriculate? 	couldn't I be matriculating?
couldn't you be matriculating?
couldn't he be matriculating?
couldn't we be matriculating?
couldn't you be matriculating?
couldn't they be matriculating? 	couldn't I have matriculated?
couldn't you have matriculated?
couldn't he have matriculated?
couldn't we have matriculated?
couldn't you have matriculated?
couldn't they have matriculated? 	couldn't I have been matriculating?
couldn't you have been matriculating?
couldn't he have been matriculating?
couldn't we have been matriculating?
couldn't you have been matriculating?
couldn't they have been matriculating?