English verb conjugation
COULD CEASE

Regular verb: cease - ceased - ceased

Affirmation

Simple form	V-ing form
I could cease you could cease he could cease we could cease you could cease they could cease	I could be ceasing you could be ceasing he could be ceasing we could be ceasing you could be ceasing they could be ceasing
Perfect	V-ing perfect
I could have ceased you could have ceased he could have ceased we could have ceased you could have ceased they could have ceased	I could have been ceasing you could have been ceasing he could have been ceasing we could have been ceasing you could have been ceasing they could have been ceasing

Negation

Simple form	V-ing form
I couldn't cease you couldn't cease he couldn't cease we couldn't cease you couldn't cease they couldn't cease	I couldn't be ceasing you couldn't be ceasing he couldn't be ceasing we couldn't be ceasing you couldn't be ceasing they couldn't be ceasing
Perfect	V-ing perfect
I couldn't have ceased you couldn't have ceased he couldn't have ceased we couldn't have ceased you couldn't have ceased they couldn't have ceased	I couldn't have been ceasing you couldn't have been ceasing he couldn't have been ceasing we couldn't have been ceasing you couldn't have been ceasing they couldn't have been ceasing

Interrogative form

Simple form	V-ing form
could I cease? could you cease? could he cease? could we cease? could you cease? could they cease?	could I be ceasing? could you be ceasing? could he be ceasing? could we be ceasing? could you be ceasing? could they be ceasing?
Perfect	V-ing perfect
could I have ceased? could you have ceased? could he have ceased? could we have ceased? could you have ceased? could they have ceased?	could I have been ceasing? could you have been ceasing? could he have been ceasing? could we have been ceasing? could you have been ceasing? could they have been ceasing?

Interro-negative form

Simple form	V-ing form
couldn't I cease? couldn't you cease? couldn't he cease? couldn't we cease? couldn't you cease? couldn't they cease?	couldn't I be ceasing? couldn't you be ceasing? couldn't he be ceasing? couldn't we be ceasing? couldn't you be ceasing? couldn't they be ceasing?
Perfect	V-ing perfect
couldn't I have ceased? couldn't you have ceased? couldn't he have ceased? couldn't we have ceased? couldn't you have ceased? couldn't they have ceased?	couldn't I have been ceasing? couldn't you have been ceasing? couldn't he have been ceasing? couldn't we have been ceasing? couldn't you have been ceasing? couldn't they have been ceasing?