English verb conjugation
COULD TEACH

Irregular verb: teach - taught - taught

Affirmation

Simple form	V-ing form
I could teach you could teach she could teach we could teach you could teach they could teach	I could be teaching you could be teaching she could be teaching we could be teaching you could be teaching they could be teaching
Perfect	V-ing perfect
I could have taught you could have taught she could have taught we could have taught you could have taught they could have taught	I could have been teaching you could have been teaching she could have been teaching we could have been teaching you could have been teaching they could have been teaching

Negation

Simple form	V-ing form
I could not teach you could not teach she could not teach we could not teach you could not teach they could not teach	I could not be teaching you could not be teaching she could not be teaching we could not be teaching you could not be teaching they could not be teaching
Perfect	V-ing perfect
I could not have taught you could not have taught she could not have taught we could not have taught you could not have taught they could not have taught	I could not have been teaching you could not have been teaching she could not have been teaching we could not have been teaching you could not have been teaching they could not have been teaching

Interrogative form

Simple form	V-ing form
could I teach? could you teach? could she teach? could we teach? could you teach? could they teach?	could I be teaching? could you be teaching? could she be teaching? could we be teaching? could you be teaching? could they be teaching?
Perfect	V-ing perfect
could I have taught? could you have taught? could she have taught? could we have taught? could you have taught? could they have taught?	could I have been teaching? could you have been teaching? could she have been teaching? could we have been teaching? could you have been teaching? could they have been teaching?

Interro-negative form

Simple form	V-ing form
could I not teach? could you not teach? could she not teach? could we not teach? could you not teach? could they not teach?	could I not be teaching? could you not be teaching? could she not be teaching? could we not be teaching? could you not be teaching? could they not be teaching?
Perfect	V-ing perfect
could I not have taught? could you not have taught? could she not have taught? could we not have taught? could you not have taught? could they not have taught?	could I not have been teaching? could you not have been teaching? could she not have been teaching? could we not have been teaching? could you not have been teaching? could they not have been teaching?