I could push-start you could push-start he could push-start we could push-start you could push-start they could push-start
V-ing form
I could be push-starting you could be push-starting he could be push-starting we could be push-starting you could be push-starting they could be push-starting
Perfect
I could have push-started you could have push-started he could have push-started we could have push-started you could have push-started they could have push-started
V-ing perfect
I could have been push-starting you could have been push-starting he could have been push-starting we could have been push-starting you could have been push-starting they could have been push-starting
Negation
Simple form
I could not push-start you could not push-start he could not push-start we could not push-start you could not push-start they could not push-start
V-ing form
I could not be push-starting you could not be push-starting he could not be push-starting we could not be push-starting you could not be push-starting they could not be push-starting
Perfect
I could not have push-started you could not have push-started he could not have push-started we could not have push-started you could not have push-started they could not have push-started
V-ing perfect
I could not have been push-starting you could not have been push-starting he could not have been push-starting we could not have been push-starting you could not have been push-starting they could not have been push-starting
Interrogative form
Simple form
could I push-start? could you push-start? could he push-start? could we push-start? could you push-start? could they push-start?
V-ing form
could I be push-starting? could you be push-starting? could he be push-starting? could we be push-starting? could you be push-starting? could they be push-starting?
Perfect
could I have push-started? could you have push-started? could he have push-started? could we have push-started? could you have push-started? could they have push-started?
V-ing perfect
could I have been push-starting? could you have been push-starting? could he have been push-starting? could we have been push-starting? could you have been push-starting? could they have been push-starting?
Interro-negative form
Simple form
could I not push-start? could you not push-start? could he not push-start? could we not push-start? could you not push-start? could they not push-start?
V-ing form
could I not be push-starting? could you not be push-starting? could he not be push-starting? could we not be push-starting? could you not be push-starting? could they not be push-starting?
Perfect
could I not have push-started? could you not have push-started? could he not have push-started? could we not have push-started? could you not have push-started? could they not have push-started?
V-ing perfect
could I not have been push-starting? could you not have been push-starting? could he not have been push-starting? could we not have been push-starting? could you not have been push-starting? could they not have been push-starting?