English verb conjugation
COULD ESTOP

Regular verb: estop - estoped - estoped

Affirmation

Simple form	V-ing form
I could estop you could estop he could estop we could estop you could estop they could estop	I could be estoping you could be estoping he could be estoping we could be estoping you could be estoping they could be estoping
Perfect	V-ing perfect
I could have estoped you could have estoped he could have estoped we could have estoped you could have estoped they could have estoped	I could have been estoping you could have been estoping he could have been estoping we could have been estoping you could have been estoping they could have been estoping

Negation

Simple form	V-ing form
I could not estop you could not estop he could not estop we could not estop you could not estop they could not estop	I could not be estoping you could not be estoping he could not be estoping we could not be estoping you could not be estoping they could not be estoping
Perfect	V-ing perfect
I could not have estoped you could not have estoped he could not have estoped we could not have estoped you could not have estoped they could not have estoped	I could not have been estoping you could not have been estoping he could not have been estoping we could not have been estoping you could not have been estoping they could not have been estoping

Interrogative form

Simple form	V-ing form
could I estop? could you estop? could he estop? could we estop? could you estop? could they estop?	could I be estoping? could you be estoping? could he be estoping? could we be estoping? could you be estoping? could they be estoping?
Perfect	V-ing perfect
could I have estoped? could you have estoped? could he have estoped? could we have estoped? could you have estoped? could they have estoped?	could I have been estoping? could you have been estoping? could he have been estoping? could we have been estoping? could you have been estoping? could they have been estoping?

Interro-negative form

Simple form	V-ing form
could I not estop? could you not estop? could he not estop? could we not estop? could you not estop? could they not estop?	could I not be estoping? could you not be estoping? could he not be estoping? could we not be estoping? could you not be estoping? could they not be estoping?
Perfect	V-ing perfect
could I not have estoped? could you not have estoped? could he not have estoped? could we not have estoped? could you not have estoped? could they not have estoped?	could I not have been estoping? could you not have been estoping? could he not have been estoping? could we not have been estoping? could you not have been estoping? could they not have been estoping?