English verb conjugation
COULD JUMP-START

Regular verb: jump-start - jump-started - jump-started

Affirmation

Simple form	V-ing form
I could jump-start you could jump-start he could jump-start we could jump-start you could jump-start they could jump-start	I could be jump-starting you could be jump-starting he could be jump-starting we could be jump-starting you could be jump-starting they could be jump-starting
Perfect	V-ing perfect
I could have jump-started you could have jump-started he could have jump-started we could have jump-started you could have jump-started they could have jump-started	I could have been jump-starting you could have been jump-starting he could have been jump-starting we could have been jump-starting you could have been jump-starting they could have been jump-starting

Negation

Simple form	V-ing form
I could not jump-start you could not jump-start he could not jump-start we could not jump-start you could not jump-start they could not jump-start	I could not be jump-starting you could not be jump-starting he could not be jump-starting we could not be jump-starting you could not be jump-starting they could not be jump-starting
Perfect	V-ing perfect
I could not have jump-started you could not have jump-started he could not have jump-started we could not have jump-started you could not have jump-started they could not have jump-started	I could not have been jump-starting you could not have been jump-starting he could not have been jump-starting we could not have been jump-starting you could not have been jump-starting they could not have been jump-starting

Interrogative form

Simple form	V-ing form
could I jump-start? could you jump-start? could he jump-start? could we jump-start? could you jump-start? could they jump-start?	could I be jump-starting? could you be jump-starting? could he be jump-starting? could we be jump-starting? could you be jump-starting? could they be jump-starting?
Perfect	V-ing perfect
could I have jump-started? could you have jump-started? could he have jump-started? could we have jump-started? could you have jump-started? could they have jump-started?	could I have been jump-starting? could you have been jump-starting? could he have been jump-starting? could we have been jump-starting? could you have been jump-starting? could they have been jump-starting?

Interro-negative form

Simple form	V-ing form
could I not jump-start? could you not jump-start? could he not jump-start? could we not jump-start? could you not jump-start? could they not jump-start?	could I not be jump-starting? could you not be jump-starting? could he not be jump-starting? could we not be jump-starting? could you not be jump-starting? could they not be jump-starting?
Perfect	V-ing perfect
could I not have jump-started? could you not have jump-started? could he not have jump-started? could we not have jump-started? could you not have jump-started? could they not have jump-started?	could I not have been jump-starting? could you not have been jump-starting? could he not have been jump-starting? could we not have been jump-starting? could you not have been jump-starting? could they not have been jump-starting?