English verb conjugation MUST REFRAIN

Regular verb: refrain - refrained - refrained

Affirmation

Simple form

I must refrain
you must refrain
he must refrain
we must refrain
you must refrain
they must refrain

V-ing form

I must be refraining
you must be refraining
he must be refraining
we must be refraining
you must be refraining
they must be refraining

Perfect

I must have refrained
you must have refrained
he must have refrained
we must have refrained
you must have refrained
they must have refrained

V-ing perfect

I must have been refraining
you must have been refraining
he must have been refraining
we must have been refraining
you must have been refraining
they must have been refraining

Negation

Simple form

I must not refrain
you must not refrain
he must not refrain
we must not refrain
you must not refrain
they must not refrain

V-ing form

I must not be refraining
you must not be refraining
he must not be refraining
we must not be refraining
you must not be refraining
they must not be refraining

Perfect

I must not have refrained
you must not have refrained
he must not have refrained
we must not have refrained
you must not have refrained
they must not have refrained

V-ing perfect

I must not have been refraining
you must not have been refraining
he must not have been refraining
we must not have been refraining
you must not have been refraining
they must not have been refraining

Interrogative form

Simple form

must I refrain?
must you refrain?
must he refrain?
must we refrain?
must you refrain?
must they refrain?

V-ing form

must I be refraining?
must you be refraining?
must he be refraining?
must we be refraining?
must you be refraining?
must they be refraining?

Perfect

must I have refrained?
must you have refrained?
must he have refrained?
must we have refrained?
must you have refrained?
must they have refrained?

V-ing perfect

must I have been refraining?
must you have been refraining?
must he have been refraining?
must we have been refraining?
must you have been refraining?
must they have been refraining?

Interro-negative form

Simple form

must I not refrain?
must you not refrain?
must he not refrain?
must we not refrain?
must you not refrain?
must they not refrain?

V-ing form

must I not be refraining?
must you not be refraining?
must he not be refraining?
must we not be refraining?
must you not be refraining?
must they not be refraining?

Perfect

must I not have refrained?
must you not have refrained?
must he not have refrained?
must we not have refrained?
must you not have refrained?
must they not have refrained?

V-ing perfect

must I not have been refraining?
must you not have been refraining?
must he not have been refraining?
must we not have been refraining?
must you not have been refraining?
must they not have been refraining?

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