I could troll you could troll she could troll we could troll you could troll they could troll
V-ing form
I could be trolling you could be trolling she could be trolling we could be trolling you could be trolling they could be trolling
Perfect
I could have trolled you could have trolled she could have trolled we could have trolled you could have trolled they could have trolled
V-ing perfect
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
I couldn't troll you couldn't troll she couldn't troll we couldn't troll you couldn't troll they couldn't troll
V-ing form
I couldn't be trolling you couldn't be trolling she couldn't be trolling we couldn't be trolling you couldn't be trolling they couldn't be trolling
Perfect
I couldn't have trolled you couldn't have trolled she couldn't have trolled we couldn't have trolled you couldn't have trolled they couldn't have trolled
V-ing perfect
I couldn't have been trolling you couldn't have been trolling she couldn't have been trolling we couldn't have been trolling you couldn't have been trolling they couldn't have been trolling
Interrogative form
Simple form
could I troll? could you troll? could she troll? could we troll? could you troll? could they troll?
V-ing form
could I be trolling? could you be trolling? could she be trolling? could we be trolling? could you be trolling? could they be trolling?
Perfect
could I have trolled? could you have trolled? could she have trolled? could we have trolled? could you have trolled? could they have trolled?
V-ing perfect
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
couldn't I troll? couldn't you troll? couldn't she troll? couldn't we troll? couldn't you troll? couldn't they troll?
V-ing form
couldn't I be trolling? couldn't you be trolling? couldn't she be trolling? couldn't we be trolling? couldn't you be trolling? couldn't they be trolling?
Perfect
couldn't I have trolled? couldn't you have trolled? couldn't she have trolled? couldn't we have trolled? couldn't you have trolled? couldn't they have trolled?
V-ing perfect
couldn't I have been trolling? couldn't you have been trolling? couldn't she have been trolling? couldn't we have been trolling? couldn't you have been trolling? couldn't they have been trolling?