English verb conjugation
COULD ENGRAIN

Regular verb: engrain - engrained - engrained

Affirmation

Simple form	V-ing form
I could engrain you could engrain he could engrain we could engrain you could engrain they could engrain	I could be engraining you could be engraining he could be engraining we could be engraining you could be engraining they could be engraining
Perfect	V-ing perfect
I could have engrained you could have engrained he could have engrained we could have engrained you could have engrained they could have engrained	I could have been engraining you could have been engraining he could have been engraining we could have been engraining you could have been engraining they could have been engraining

Negation

Simple form	V-ing form
I could not engrain you could not engrain he could not engrain we could not engrain you could not engrain they could not engrain	I could not be engraining you could not be engraining he could not be engraining we could not be engraining you could not be engraining they could not be engraining
Perfect	V-ing perfect
I could not have engrained you could not have engrained he could not have engrained we could not have engrained you could not have engrained they could not have engrained	I could not have been engraining you could not have been engraining he could not have been engraining we could not have been engraining you could not have been engraining they could not have been engraining

Interrogative form

Simple form	V-ing form
could I engrain? could you engrain? could he engrain? could we engrain? could you engrain? could they engrain?	could I be engraining? could you be engraining? could he be engraining? could we be engraining? could you be engraining? could they be engraining?
Perfect	V-ing perfect
could I have engrained? could you have engrained? could he have engrained? could we have engrained? could you have engrained? could they have engrained?	could I have been engraining? could you have been engraining? could he have been engraining? could we have been engraining? could you have been engraining? could they have been engraining?

Interro-negative form

Simple form	V-ing form
could I not engrain? could you not engrain? could he not engrain? could we not engrain? could you not engrain? could they not engrain?	could I not be engraining? could you not be engraining? could he not be engraining? could we not be engraining? could you not be engraining? could they not be engraining?
Perfect	V-ing perfect
could I not have engrained? could you not have engrained? could he not have engrained? could we not have engrained? could you not have engrained? could they not have engrained?	could I not have been engraining? could you not have been engraining? could he not have been engraining? could we not have been engraining? could you not have been engraining? could they not have been engraining?