English verb conjugation
CAN ROUGHEN

Regular verb: roughen - roughened - roughened

Affirmation

Simple form	V-ing form
I can roughen you can roughen he can roughen we can roughen you can roughen they can roughen	I can be roughening you can be roughening he can be roughening we can be roughening you can be roughening they can be roughening
Perfect	V-ing perfect
I can have roughened you can have roughened he can have roughened we can have roughened you can have roughened they can have roughened	I can have been roughening you can have been roughening he can have been roughening we can have been roughening you can have been roughening they can have been roughening

Negation

Simple form	V-ing form
I cannot roughen you cannot roughen he cannot roughen we cannot roughen you cannot roughen they cannot roughen	I cannot be roughening you cannot be roughening he cannot be roughening we cannot be roughening you cannot be roughening they cannot be roughening
Perfect	V-ing perfect
I cannot have roughened you cannot have roughened he cannot have roughened we cannot have roughened you cannot have roughened they cannot have roughened	I cannot have been roughening you cannot have been roughening he cannot have been roughening we cannot have been roughening you cannot have been roughening they cannot have been roughening

Interrogative form

Simple form	V-ing form
can I roughen? can you roughen? can he roughen? can we roughen? can you roughen? can they roughen?	can I be roughening? can you be roughening? can he be roughening? can we be roughening? can you be roughening? can they be roughening?
Perfect	V-ing perfect
can I have roughened? can you have roughened? can he have roughened? can we have roughened? can you have roughened? can they have roughened?	can I have been roughening? can you have been roughening? can he have been roughening? can we have been roughening? can you have been roughening? can they have been roughening?

Interro-negative form

Simple form	V-ing form
can I not roughen? can you not roughen? can he not roughen? can we not roughen? can you not roughen? can they not roughen?	can I not be roughening? can you not be roughening? can he not be roughening? can we not be roughening? can you not be roughening? can they not be roughening?
Perfect	V-ing perfect
can I not have roughened? can you not have roughened? can he not have roughened? can we not have roughened? can you not have roughened? can they not have roughened?	can I not have been roughening? can you not have been roughening? can he not have been roughening? can we not have been roughening? can you not have been roughening? can they not have been roughening?