English verb conjugation
CAN ROUGH

Regular verb: rough - roughed - roughed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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