English verb conjugation
COULD BEEF

Regular verb: beef - beefed - beefed

Affirmation

Simple form	V-ing form
I could beef you could beef she could beef we could beef you could beef they could beef	I could be beefing you could be beefing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she beef? could we beef? could you beef? could they beef?	could I be beefing? could you be beefing? could she 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 she 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 she 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 she 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 she 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 she 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 she have been beefing? couldn't we have been beefing? couldn't you have been beefing? couldn't they have been beefing?