could integrate
Regular verb: integrate - integrated- integrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could integrate
you could integrate
he could integrate
we could integrate
you could integrate
they could integrate 	I could be integrating
you could be integrating
he could be integrating
we could be integrating
you could be integrating
they could be integrating	I could have integrated
you could have integrated
he could have integrated
we could have integrated
you could have integrated
they could have integrated	I could have been integrating
you could have been integrating
he could have been integrating
we could have been integrating
you could have been integrating
they could have been integrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't integrate
you couldn't integrate
he couldn't integrate
we couldn't integrate
you couldn't integrate
they couldn't integrate 	I couldn't be integrating
you couldn't be integrating
he couldn't be integrating
we couldn't be integrating
you couldn't be integrating
they couldn't be integrating	I couldn't have integrated
you couldn't have integrated
he couldn't have integrated
we couldn't have integrated
you couldn't have integrated
they couldn't have integrated	I couldn't have been integrating
you couldn't have been integrating
he couldn't have been integrating
we couldn't have been integrating
you couldn't have been integrating
they couldn't have been integrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I integrate?
could you integrate?
could he integrate?
could we integrate?
could you integrate?
could they integrate? 	could I be integrating?
could you be integrating?
could he be integrating?
could we be integrating?
could you be integrating?
could they be integrating? 	could I have integrated?
could you have integrated?
could he have integrated?
could we have integrated?
could you have integrated?
could they have integrated? 	could I have been integrating?
could you have been integrating?
could he have been integrating?
could we have been integrating?
could you have been integrating?
could they have been integrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I integrate?
couldn't you integrate?
couldn't he integrate?
couldn't we integrate?
couldn't you integrate?
couldn't they integrate? 	couldn't I be integrating?
couldn't you be integrating?
couldn't he be integrating?
couldn't we be integrating?
couldn't you be integrating?
couldn't they be integrating? 	couldn't I have integrated?
couldn't you have integrated?
couldn't he have integrated?
couldn't we have integrated?
couldn't you have integrated?
couldn't they have integrated? 	couldn't I have been integrating?
couldn't you have been integrating?
couldn't he have been integrating?
couldn't we have been integrating?
couldn't you have been integrating?
couldn't they have been integrating?