could beef
Regular verb: beef - beefed- beefed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could beef
you could beef
he could beef
we could beef
you could beef
they could beef 	I could be beefing
you could be beefing
he could be beefing
we could be beefing
you could be beefing
they could be beefing	I could have beefed
you could have beefed
he could have beefed
we could have beefed
you could have beefed
they could have beefed	I could have been beefing
you could have been beefing
he could have been beefing
we could have been beefing
you could have been beefing
they could have been beefing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not beef
you could not beef
he could not beef
we could not beef
you could not beef
they could not beef 	I could not be beefing
you could not be beefing
he could not be beefing
we could not be beefing
you could not be beefing
they could not be beefing	I could not have beefed
you could not have beefed
he could not have beefed
we could not have beefed
you could not have beefed
they could not have beefed	I could not have been beefing
you could not have been beefing
he could not have been beefing
we could not have been beefing
you could not have been beefing
they could not have been beefing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I beef?
could you beef?
could he beef?
could we beef?
could you beef?
could they beef? 	could I be beefing?
could you be beefing?
could he be beefing?
could we be beefing?
could you be beefing?
could they be beefing? 	could I have beefed?
could you have beefed?
could he have beefed?
could we have beefed?
could you have beefed?
could they have beefed? 	could I have been beefing?
could you have been beefing?
could he have been beefing?
could we have been beefing?
could you have been beefing?
could they have been beefing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not beef?
could you not beef?
could he not beef?
could we not beef?
could you not beef?
could they not beef? 	could I not be beefing?
could you not be beefing?
could he not be beefing?
could we not be beefing?
could you not be beefing?
could they not be beefing? 	could I not have beefed?
could you not have beefed?
could he not have beefed?
could we not have beefed?
could you not have beefed?
could they not have beefed? 	could I not have been beefing?
could you not have been beefing?
could he not have been beefing?
could we not have been beefing?
could you not have been beefing?
could they not have been beefing?