English verb conjugation
COULD CRATER

Regular verb: crater - cratered - cratered

Affirmation

Simple form	V-ing form
I could crater you could crater he could crater we could crater you could crater they could crater	I could be cratering you could be cratering he could be cratering we could be cratering you could be cratering they could be cratering
Perfect	V-ing perfect
I could have cratered you could have cratered he could have cratered we could have cratered you could have cratered they could have cratered	I could have been cratering you could have been cratering he could have been cratering we could have been cratering you could have been cratering they could have been cratering

Negation

Simple form	V-ing form
I could not crater you could not crater he could not crater we could not crater you could not crater they could not crater	I could not be cratering you could not be cratering he could not be cratering we could not be cratering you could not be cratering they could not be cratering
Perfect	V-ing perfect
I could not have cratered you could not have cratered he could not have cratered we could not have cratered you could not have cratered they could not have cratered	I could not have been cratering you could not have been cratering he could not have been cratering we could not have been cratering you could not have been cratering they could not have been cratering

Interrogative form

Simple form	V-ing form
could I crater? could you crater? could he crater? could we crater? could you crater? could they crater?	could I be cratering? could you be cratering? could he be cratering? could we be cratering? could you be cratering? could they be cratering?
Perfect	V-ing perfect
could I have cratered? could you have cratered? could he have cratered? could we have cratered? could you have cratered? could they have cratered?	could I have been cratering? could you have been cratering? could he have been cratering? could we have been cratering? could you have been cratering? could they have been cratering?

Interro-negative form

Simple form	V-ing form
could I not crater? could you not crater? could he not crater? could we not crater? could you not crater? could they not crater?	could I not be cratering? could you not be cratering? could he not be cratering? could we not be cratering? could you not be cratering? could they not be cratering?
Perfect	V-ing perfect
could I not have cratered? could you not have cratered? could he not have cratered? could we not have cratered? could you not have cratered? could they not have cratered?	could I not have been cratering? could you not have been cratering? could he not have been cratering? could we not have been cratering? could you not have been cratering? could they not have been cratering?