could crossruff
Regular verb: crossruff - crossruffed- crossruffed

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

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