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 couldn't crater you couldn't crater he couldn't crater we couldn't crater you couldn't crater they couldn't crater	I couldn't be cratering you couldn't be cratering he couldn't be cratering we couldn't be cratering you couldn't be cratering they couldn't be cratering
Perfect	V-ing perfect
I couldn't have cratered you couldn't have cratered he couldn't have cratered we couldn't have cratered you couldn't have cratered they couldn't have cratered	I couldn't have been cratering you couldn't have been cratering he couldn't have been cratering we couldn't have been cratering you couldn't have been cratering they couldn't 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
couldn't I crater? couldn't you crater? couldn't he crater? couldn't we crater? couldn't you crater? couldn't they crater?	couldn't I be cratering? couldn't you be cratering? couldn't he be cratering? couldn't we be cratering? couldn't you be cratering? couldn't they be cratering?
Perfect	V-ing perfect
couldn't I have cratered? couldn't you have cratered? couldn't he have cratered? couldn't we have cratered? couldn't you have cratered? couldn't they have cratered?	couldn't I have been cratering? couldn't you have been cratering? couldn't he have been cratering? couldn't we have been cratering? couldn't you have been cratering? couldn't they have been cratering?