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 couldn't jump-start you couldn't jump-start he couldn't jump-start we couldn't jump-start you couldn't jump-start they couldn't jump-start	I couldn't be jump-starting you couldn't be jump-starting he couldn't be jump-starting we couldn't be jump-starting you couldn't be jump-starting they couldn't be jump-starting
Perfect	V-ing perfect
I couldn't have jump-started you couldn't have jump-started he couldn't have jump-started we couldn't have jump-started you couldn't have jump-started they couldn't have jump-started	I couldn't have been jump-starting you couldn't have been jump-starting he couldn't have been jump-starting we couldn't have been jump-starting you couldn't have been jump-starting they couldn't 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
couldn't I jump-start? couldn't you jump-start? couldn't he jump-start? couldn't we jump-start? couldn't you jump-start? couldn't they jump-start?	couldn't I be jump-starting? couldn't you be jump-starting? couldn't he be jump-starting? couldn't we be jump-starting? couldn't you be jump-starting? couldn't they be jump-starting?
Perfect	V-ing perfect
couldn't I have jump-started? couldn't you have jump-started? couldn't he have jump-started? couldn't we have jump-started? couldn't you have jump-started? couldn't they have jump-started?	couldn't I have been jump-starting? couldn't you have been jump-starting? couldn't he have been jump-starting? couldn't we have been jump-starting? couldn't you have been jump-starting? couldn't they have been jump-starting?