English verb conjugation
COULD INGRAIN

Regular verb: ingrain - ingrained - ingrained

Affirmation

Simple form	V-ing form
I could ingrain you could ingrain he could ingrain we could ingrain you could ingrain they could ingrain	I could be ingraining you could be ingraining he could be ingraining we could be ingraining you could be ingraining they could be ingraining
Perfect	V-ing perfect
I could have ingrained you could have ingrained he could have ingrained we could have ingrained you could have ingrained they could have ingrained	I could have been ingraining you could have been ingraining he could have been ingraining we could have been ingraining you could have been ingraining they could have been ingraining

Negation

Simple form	V-ing form
I could not ingrain you could not ingrain he could not ingrain we could not ingrain you could not ingrain they could not ingrain	I could not be ingraining you could not be ingraining he could not be ingraining we could not be ingraining you could not be ingraining they could not be ingraining
Perfect	V-ing perfect
I could not have ingrained you could not have ingrained he could not have ingrained we could not have ingrained you could not have ingrained they could not have ingrained	I could not have been ingraining you could not have been ingraining he could not have been ingraining we could not have been ingraining you could not have been ingraining they could not have been ingraining

Interrogative form

Simple form	V-ing form
could I ingrain? could you ingrain? could he ingrain? could we ingrain? could you ingrain? could they ingrain?	could I be ingraining? could you be ingraining? could he be ingraining? could we be ingraining? could you be ingraining? could they be ingraining?
Perfect	V-ing perfect
could I have ingrained? could you have ingrained? could he have ingrained? could we have ingrained? could you have ingrained? could they have ingrained?	could I have been ingraining? could you have been ingraining? could he have been ingraining? could we have been ingraining? could you have been ingraining? could they have been ingraining?

Interro-negative form

Simple form	V-ing form
could I not ingrain? could you not ingrain? could he not ingrain? could we not ingrain? could you not ingrain? could they not ingrain?	could I not be ingraining? could you not be ingraining? could he not be ingraining? could we not be ingraining? could you not be ingraining? could they not be ingraining?
Perfect	V-ing perfect
could I not have ingrained? could you not have ingrained? could he not have ingrained? could we not have ingrained? could you not have ingrained? could they not have ingrained?	could I not have been ingraining? could you not have been ingraining? could he not have been ingraining? could we not have been ingraining? could you not have been ingraining? could they not have been ingraining?