English verb conjugation
COULD ROUGHHOUSE

Regular verb: roughhouse - roughhoused - roughhoused

Affirmation

Simple form	V-ing form
I could roughhouse you could roughhouse he could roughhouse we could roughhouse you could roughhouse they could roughhouse	I could be roughhousing you could be roughhousing he could be roughhousing we could be roughhousing you could be roughhousing they could be roughhousing
Perfect	V-ing perfect
I could have roughhoused you could have roughhoused he could have roughhoused we could have roughhoused you could have roughhoused they could have roughhoused	I could have been roughhousing you could have been roughhousing he could have been roughhousing we could have been roughhousing you could have been roughhousing they could have been roughhousing

Negation

Simple form	V-ing form
I could not roughhouse you could not roughhouse he could not roughhouse we could not roughhouse you could not roughhouse they could not roughhouse	I could not be roughhousing you could not be roughhousing he could not be roughhousing we could not be roughhousing you could not be roughhousing they could not be roughhousing
Perfect	V-ing perfect
I could not have roughhoused you could not have roughhoused he could not have roughhoused we could not have roughhoused you could not have roughhoused they could not have roughhoused	I could not have been roughhousing you could not have been roughhousing he could not have been roughhousing we could not have been roughhousing you could not have been roughhousing they could not have been roughhousing

Interrogative form

Simple form	V-ing form
could I roughhouse? could you roughhouse? could he roughhouse? could we roughhouse? could you roughhouse? could they roughhouse?	could I be roughhousing? could you be roughhousing? could he be roughhousing? could we be roughhousing? could you be roughhousing? could they be roughhousing?
Perfect	V-ing perfect
could I have roughhoused? could you have roughhoused? could he have roughhoused? could we have roughhoused? could you have roughhoused? could they have roughhoused?	could I have been roughhousing? could you have been roughhousing? could he have been roughhousing? could we have been roughhousing? could you have been roughhousing? could they have been roughhousing?

Interro-negative form

Simple form	V-ing form
could I not roughhouse? could you not roughhouse? could he not roughhouse? could we not roughhouse? could you not roughhouse? could they not roughhouse?	could I not be roughhousing? could you not be roughhousing? could he not be roughhousing? could we not be roughhousing? could you not be roughhousing? could they not be roughhousing?
Perfect	V-ing perfect
could I not have roughhoused? could you not have roughhoused? could he not have roughhoused? could we not have roughhoused? could you not have roughhoused? could they not have roughhoused?	could I not have been roughhousing? could you not have been roughhousing? could he not have been roughhousing? could we not have been roughhousing? could you not have been roughhousing? could they not have been roughhousing?