English verb conjugation
COULD FEAST

Regular verb: feast - feasted - feasted

Affirmation

Simple form	V-ing form
I could feast you could feast he could feast we could feast you could feast they could feast	I could be feasting you could be feasting he could be feasting we could be feasting you could be feasting they could be feasting
Perfect	V-ing perfect
I could have feasted you could have feasted he could have feasted we could have feasted you could have feasted they could have feasted	I could have been feasting you could have been feasting he could have been feasting we could have been feasting you could have been feasting they could have been feasting

Negation

Simple form	V-ing form
I couldn't feast you couldn't feast he couldn't feast we couldn't feast you couldn't feast they couldn't feast	I couldn't be feasting you couldn't be feasting he couldn't be feasting we couldn't be feasting you couldn't be feasting they couldn't be feasting
Perfect	V-ing perfect
I couldn't have feasted you couldn't have feasted he couldn't have feasted we couldn't have feasted you couldn't have feasted they couldn't have feasted	I couldn't have been feasting you couldn't have been feasting he couldn't have been feasting we couldn't have been feasting you couldn't have been feasting they couldn't have been feasting

Interrogative form

Simple form	V-ing form
could I feast? could you feast? could he feast? could we feast? could you feast? could they feast?	could I be feasting? could you be feasting? could he be feasting? could we be feasting? could you be feasting? could they be feasting?
Perfect	V-ing perfect
could I have feasted? could you have feasted? could he have feasted? could we have feasted? could you have feasted? could they have feasted?	could I have been feasting? could you have been feasting? could he have been feasting? could we have been feasting? could you have been feasting? could they have been feasting?

Interro-negative form

Simple form	V-ing form
couldn't I feast? couldn't you feast? couldn't he feast? couldn't we feast? couldn't you feast? couldn't they feast?	couldn't I be feasting? couldn't you be feasting? couldn't he be feasting? couldn't we be feasting? couldn't you be feasting? couldn't they be feasting?
Perfect	V-ing perfect
couldn't I have feasted? couldn't you have feasted? couldn't he have feasted? couldn't we have feasted? couldn't you have feasted? couldn't they have feasted?	couldn't I have been feasting? couldn't you have been feasting? couldn't he have been feasting? couldn't we have been feasting? couldn't you have been feasting? couldn't they have been feasting?