English verb conjugation
MUST TEACH

Irregular verb: teach - taught - taught

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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