English verb conjugation
COULD ROUGH

Regular verb: rough - roughed - roughed

Affirmation

Simple form	V-ing form
I could rough you could rough he could rough we could rough you could rough they could rough	I could be roughing you could be roughing he could be roughing we could be roughing you could be roughing they could be roughing
Perfect	V-ing perfect
I could have roughed you could have roughed he could have roughed we could have roughed you could have roughed they could have roughed	I could have been roughing you could have been roughing he could have been roughing we could have been roughing you could have been roughing they could have been roughing

Negation

Simple form	V-ing form
I couldn't rough you couldn't rough he couldn't rough we couldn't rough you couldn't rough they couldn't rough	I couldn't be roughing you couldn't be roughing he couldn't be roughing we couldn't be roughing you couldn't be roughing they couldn't be roughing
Perfect	V-ing perfect
I couldn't have roughed you couldn't have roughed he couldn't have roughed we couldn't have roughed you couldn't have roughed they couldn't have roughed	I couldn't have been roughing you couldn't have been roughing he couldn't have been roughing we couldn't have been roughing you couldn't have been roughing they couldn't have been roughing

Interrogative form

Simple form	V-ing form
could I rough? could you rough? could he rough? could we rough? could you rough? could they rough?	could I be roughing? could you be roughing? could he be roughing? could we be roughing? could you be roughing? could they be roughing?
Perfect	V-ing perfect
could I have roughed? could you have roughed? could he have roughed? could we have roughed? could you have roughed? could they have roughed?	could I have been roughing? could you have been roughing? could he have been roughing? could we have been roughing? could you have been roughing? could they have been roughing?

Interro-negative form

Simple form	V-ing form
couldn't I rough? couldn't you rough? couldn't he rough? couldn't we rough? couldn't you rough? couldn't they rough?	couldn't I be roughing? couldn't you be roughing? couldn't he be roughing? couldn't we be roughing? couldn't you be roughing? couldn't they be roughing?
Perfect	V-ing perfect
couldn't I have roughed? couldn't you have roughed? couldn't he have roughed? couldn't we have roughed? couldn't you have roughed? couldn't they have roughed?	couldn't I have been roughing? couldn't you have been roughing? couldn't he have been roughing? couldn't we have been roughing? couldn't you have been roughing? couldn't they have been roughing?