could troll
Regular verb: troll - trolled- trolled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could troll
you could troll
she could troll
we could troll
you could troll
they could troll 	I could be trolling
you could be trolling
she could be trolling
we could be trolling
you could be trolling
they could be trolling	I could have trolled
you could have trolled
she could have trolled
we could have trolled
you could have trolled
they could have trolled	I could have been trolling
you could have been trolling
she could have been trolling
we could have been trolling
you could have been trolling
they could have been trolling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not troll
you could not troll
she could not troll
we could not troll
you could not troll
they could not troll 	I could not be trolling
you could not be trolling
she could not be trolling
we could not be trolling
you could not be trolling
they could not be trolling	I could not have trolled
you could not have trolled
she could not have trolled
we could not have trolled
you could not have trolled
they could not have trolled	I could not have been trolling
you could not have been trolling
she could not have been trolling
we could not have been trolling
you could not have been trolling
they could not have been trolling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I troll?
could you troll?
could she troll?
could we troll?
could you troll?
could they troll? 	could I be trolling?
could you be trolling?
could she be trolling?
could we be trolling?
could you be trolling?
could they be trolling? 	could I have trolled?
could you have trolled?
could she have trolled?
could we have trolled?
could you have trolled?
could they have trolled? 	could I have been trolling?
could you have been trolling?
could she have been trolling?
could we have been trolling?
could you have been trolling?
could they have been trolling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not troll?
could you not troll?
could she not troll?
could we not troll?
could you not troll?
could they not troll? 	could I not be trolling?
could you not be trolling?
could she not be trolling?
could we not be trolling?
could you not be trolling?
could they not be trolling? 	could I not have trolled?
could you not have trolled?
could she not have trolled?
could we not have trolled?
could you not have trolled?
could they not have trolled? 	could I not have been trolling?
could you not have been trolling?
could she not have been trolling?
could we not have been trolling?
could you not have been trolling?
could they not have been trolling?