English verb conjugation
COULD RESERVE

Regular verb: reserve - reserved - reserved

Affirmation

Simple form	V-ing form
I could reserve you could reserve he could reserve we could reserve you could reserve they could reserve	I could be reserving you could be reserving he could be reserving we could be reserving you could be reserving they could be reserving
Perfect	V-ing perfect
I could have reserved you could have reserved he could have reserved we could have reserved you could have reserved they could have reserved	I could have been reserving you could have been reserving he could have been reserving we could have been reserving you could have been reserving they could have been reserving

Negation

Simple form	V-ing form
I could not reserve you could not reserve he could not reserve we could not reserve you could not reserve they could not reserve	I could not be reserving you could not be reserving he could not be reserving we could not be reserving you could not be reserving they could not be reserving
Perfect	V-ing perfect
I could not have reserved you could not have reserved he could not have reserved we could not have reserved you could not have reserved they could not have reserved	I could not have been reserving you could not have been reserving he could not have been reserving we could not have been reserving you could not have been reserving they could not have been reserving

Interrogative form

Simple form	V-ing form
could I reserve? could you reserve? could he reserve? could we reserve? could you reserve? could they reserve?	could I be reserving? could you be reserving? could he be reserving? could we be reserving? could you be reserving? could they be reserving?
Perfect	V-ing perfect
could I have reserved? could you have reserved? could he have reserved? could we have reserved? could you have reserved? could they have reserved?	could I have been reserving? could you have been reserving? could he have been reserving? could we have been reserving? could you have been reserving? could they have been reserving?

Interro-negative form

Simple form	V-ing form
could I not reserve? could you not reserve? could he not reserve? could we not reserve? could you not reserve? could they not reserve?	could I not be reserving? could you not be reserving? could he not be reserving? could we not be reserving? could you not be reserving? could they not be reserving?
Perfect	V-ing perfect
could I not have reserved? could you not have reserved? could he not have reserved? could we not have reserved? could you not have reserved? could they not have reserved?	could I not have been reserving? could you not have been reserving? could he not have been reserving? could we not have been reserving? could you not have been reserving? could they not have been reserving?