could colligate
Regular verb: colligate - colligated- colligated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could colligate
you could colligate
he could colligate
we could colligate
you could colligate
they could colligate 	I could be colligating
you could be colligating
he could be colligating
we could be colligating
you could be colligating
they could be colligating	I could have colligated
you could have colligated
he could have colligated
we could have colligated
you could have colligated
they could have colligated	I could have been colligating
you could have been colligating
he could have been colligating
we could have been colligating
you could have been colligating
they could have been colligating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't colligate
you couldn't colligate
he couldn't colligate
we couldn't colligate
you couldn't colligate
they couldn't colligate 	I couldn't be colligating
you couldn't be colligating
he couldn't be colligating
we couldn't be colligating
you couldn't be colligating
they couldn't be colligating	I couldn't have colligated
you couldn't have colligated
he couldn't have colligated
we couldn't have colligated
you couldn't have colligated
they couldn't have colligated	I couldn't have been colligating
you couldn't have been colligating
he couldn't have been colligating
we couldn't have been colligating
you couldn't have been colligating
they couldn't have been colligating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I colligate?
could you colligate?
could he colligate?
could we colligate?
could you colligate?
could they colligate? 	could I be colligating?
could you be colligating?
could he be colligating?
could we be colligating?
could you be colligating?
could they be colligating? 	could I have colligated?
could you have colligated?
could he have colligated?
could we have colligated?
could you have colligated?
could they have colligated? 	could I have been colligating?
could you have been colligating?
could he have been colligating?
could we have been colligating?
could you have been colligating?
could they have been colligating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I colligate?
couldn't you colligate?
couldn't he colligate?
couldn't we colligate?
couldn't you colligate?
couldn't they colligate? 	couldn't I be colligating?
couldn't you be colligating?
couldn't he be colligating?
couldn't we be colligating?
couldn't you be colligating?
couldn't they be colligating? 	couldn't I have colligated?
couldn't you have colligated?
couldn't he have colligated?
couldn't we have colligated?
couldn't you have colligated?
couldn't they have colligated? 	couldn't I have been colligating?
couldn't you have been colligating?
couldn't he have been colligating?
couldn't we have been colligating?
couldn't you have been colligating?
couldn't they have been colligating?