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 couldn't estop you couldn't estop he couldn't estop we couldn't estop you couldn't estop they couldn't estop	I couldn't be estoping you couldn't be estoping he couldn't be estoping we couldn't be estoping you couldn't be estoping they couldn't be estoping
Perfect	V-ing perfect
I couldn't have estoped you couldn't have estoped he couldn't have estoped we couldn't have estoped you couldn't have estoped they couldn't have estoped	I couldn't have been estoping you couldn't have been estoping he couldn't have been estoping we couldn't have been estoping you couldn't have been estoping they couldn't 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
couldn't I estop? couldn't you estop? couldn't he estop? couldn't we estop? couldn't you estop? couldn't they estop?	couldn't I be estoping? couldn't you be estoping? couldn't he be estoping? couldn't we be estoping? couldn't you be estoping? couldn't they be estoping?
Perfect	V-ing perfect
couldn't I have estoped? couldn't you have estoped? couldn't he have estoped? couldn't we have estoped? couldn't you have estoped? couldn't they have estoped?	couldn't I have been estoping? couldn't you have been estoping? couldn't he have been estoping? couldn't we have been estoping? couldn't you have been estoping? couldn't they have been estoping?