English verb conjugation
CAN ROUGHHOUSE

Regular verb: roughhouse - roughhoused - roughhoused

Affirmation

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

Negation

Simple form	V-ing form
I can't roughhouse you can't roughhouse he can't roughhouse we can't roughhouse you can't roughhouse they can't roughhouse	I can't be roughhousing you can't be roughhousing he can't be roughhousing we can't be roughhousing you can't be roughhousing they can't be roughhousing
Perfect	V-ing perfect
I can't have roughhoused you can't have roughhoused he can't have roughhoused we can't have roughhoused you can't have roughhoused they can't have roughhoused	I can't have been roughhousing you can't have been roughhousing he can't have been roughhousing we can't have been roughhousing you can't have been roughhousing they can't have been roughhousing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I roughhouse? can't you roughhouse? can't he roughhouse? can't we roughhouse? can't you roughhouse? can't they roughhouse?	can't I be roughhousing? can't you be roughhousing? can't he be roughhousing? can't we be roughhousing? can't you be roughhousing? can't they be roughhousing?
Perfect	V-ing perfect
can't I have roughhoused? can't you have roughhoused? can't he have roughhoused? can't we have roughhoused? can't you have roughhoused? can't they have roughhoused?	can't I have been roughhousing? can't you have been roughhousing? can't he have been roughhousing? can't we have been roughhousing? can't you have been roughhousing? can't they have been roughhousing?