English verb conjugation
COULD CROSSRUFF

Regular verb: crossruff - crossruffed - crossruffed

Affirmation

Simple form	V-ing form
I could crossruff you could crossruff he could crossruff we could crossruff you could crossruff they could crossruff	I could be crossruffing you could be crossruffing he could be crossruffing we could be crossruffing you could be crossruffing they could be crossruffing
Perfect	V-ing perfect
I could have crossruffed you could have crossruffed he could have crossruffed we could have crossruffed you could have crossruffed they could have crossruffed	I could have been crossruffing you could have been crossruffing he could have been crossruffing we could have been crossruffing you could have been crossruffing they could have been crossruffing

Negation

Simple form	V-ing form
I could not crossruff you could not crossruff he could not crossruff we could not crossruff you could not crossruff they could not crossruff	I could not be crossruffing you could not be crossruffing he could not be crossruffing we could not be crossruffing you could not be crossruffing they could not be crossruffing
Perfect	V-ing perfect
I could not have crossruffed you could not have crossruffed he could not have crossruffed we could not have crossruffed you could not have crossruffed they could not have crossruffed	I could not have been crossruffing you could not have been crossruffing he could not have been crossruffing we could not have been crossruffing you could not have been crossruffing they could not have been crossruffing

Interrogative form

Simple form	V-ing form
could I crossruff? could you crossruff? could he crossruff? could we crossruff? could you crossruff? could they crossruff?	could I be crossruffing? could you be crossruffing? could he be crossruffing? could we be crossruffing? could you be crossruffing? could they be crossruffing?
Perfect	V-ing perfect
could I have crossruffed? could you have crossruffed? could he have crossruffed? could we have crossruffed? could you have crossruffed? could they have crossruffed?	could I have been crossruffing? could you have been crossruffing? could he have been crossruffing? could we have been crossruffing? could you have been crossruffing? could they have been crossruffing?

Interro-negative form

Simple form	V-ing form
could I not crossruff? could you not crossruff? could he not crossruff? could we not crossruff? could you not crossruff? could they not crossruff?	could I not be crossruffing? could you not be crossruffing? could he not be crossruffing? could we not be crossruffing? could you not be crossruffing? could they not be crossruffing?
Perfect	V-ing perfect
could I not have crossruffed? could you not have crossruffed? could he not have crossruffed? could we not have crossruffed? could you not have crossruffed? could they not have crossruffed?	could I not have been crossruffing? could you not have been crossruffing? could he not have been crossruffing? could we not have been crossruffing? could you not have been crossruffing? could they not have been crossruffing?