English verb conjugation
COULD BUST

Regular verb: bust - busted - busted

Affirmation

Simple form	V-ing form
I could bust you could bust he could bust we could bust you could bust they could bust	I could be busting you could be busting he could be busting we could be busting you could be busting they could be busting
Perfect	V-ing perfect
I could have busted you could have busted he could have busted we could have busted you could have busted they could have busted	I could have been busting you could have been busting he could have been busting we could have been busting you could have been busting they could have been busting

Negation

Simple form	V-ing form
I couldn't bust you couldn't bust he couldn't bust we couldn't bust you couldn't bust they couldn't bust	I couldn't be busting you couldn't be busting he couldn't be busting we couldn't be busting you couldn't be busting they couldn't be busting
Perfect	V-ing perfect
I couldn't have busted you couldn't have busted he couldn't have busted we couldn't have busted you couldn't have busted they couldn't have busted	I couldn't have been busting you couldn't have been busting he couldn't have been busting we couldn't have been busting you couldn't have been busting they couldn't have been busting

Interrogative form

Simple form	V-ing form
could I bust? could you bust? could he bust? could we bust? could you bust? could they bust?	could I be busting? could you be busting? could he be busting? could we be busting? could you be busting? could they be busting?
Perfect	V-ing perfect
could I have busted? could you have busted? could he have busted? could we have busted? could you have busted? could they have busted?	could I have been busting? could you have been busting? could he have been busting? could we have been busting? could you have been busting? could they have been busting?

Interro-negative form

Simple form	V-ing form
couldn't I bust? couldn't you bust? couldn't he bust? couldn't we bust? couldn't you bust? couldn't they bust?	couldn't I be busting? couldn't you be busting? couldn't he be busting? couldn't we be busting? couldn't you be busting? couldn't they be busting?
Perfect	V-ing perfect
couldn't I have busted? couldn't you have busted? couldn't he have busted? couldn't we have busted? couldn't you have busted? couldn't they have busted?	couldn't I have been busting? couldn't you have been busting? couldn't he have been busting? couldn't we have been busting? couldn't you have been busting? couldn't they have been busting?