English verb conjugation
COULD BEEF

Regular verb: beef - beefed - beefed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I couldn't beef you couldn't beef he couldn't beef we couldn't beef you couldn't beef they couldn't beef	I couldn't be beefing you couldn't be beefing he couldn't be beefing we couldn't be beefing you couldn't be beefing they couldn't be beefing
Perfect	V-ing perfect
I couldn't have beefed you couldn't have beefed he couldn't have beefed we couldn't have beefed you couldn't have beefed they couldn't have beefed	I couldn't have been beefing you couldn't have been beefing he couldn't have been beefing we couldn't have been beefing you couldn't have been beefing they couldn't have been beefing

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
couldn't I beef? couldn't you beef? couldn't he beef? couldn't we beef? couldn't you beef? couldn't they beef?	couldn't I be beefing? couldn't you be beefing? couldn't he be beefing? couldn't we be beefing? couldn't you be beefing? couldn't they be beefing?
Perfect	V-ing perfect
couldn't I have beefed? couldn't you have beefed? couldn't he have beefed? couldn't we have beefed? couldn't you have beefed? couldn't they have beefed?	couldn't I have been beefing? couldn't you have been beefing? couldn't he have been beefing? couldn't we have been beefing? couldn't you have been beefing? couldn't they have been beefing?