English verb conjugation
CAN CROSSRUFF

Regular verb: crossruff - crossruffed - crossruffed

Affirmation

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

Negation

Simple form	V-ing form
I can't crossruff you can't crossruff he can't crossruff we can't crossruff you can't crossruff they can't crossruff	I can't be crossruffing you can't be crossruffing he can't be crossruffing we can't be crossruffing you can't be crossruffing they can't be crossruffing
Perfect	V-ing perfect
I can't have crossruffed you can't have crossruffed he can't have crossruffed we can't have crossruffed you can't have crossruffed they can't have crossruffed	I can't have been crossruffing you can't have been crossruffing he can't have been crossruffing we can't have been crossruffing you can't have been crossruffing they can't have been crossruffing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can't I crossruff? can't you crossruff? can't he crossruff? can't we crossruff? can't you crossruff? can't they crossruff?	can't I be crossruffing? can't you be crossruffing? can't he be crossruffing? can't we be crossruffing? can't you be crossruffing? can't they be crossruffing?
Perfect	V-ing perfect
can't I have crossruffed? can't you have crossruffed? can't he have crossruffed? can't we have crossruffed? can't you have crossruffed? can't they have crossruffed?	can't I have been crossruffing? can't you have been crossruffing? can't he have been crossruffing? can't we have been crossruffing? can't you have been crossruffing? can't they have been crossruffing?