English verb conjugation MUST PUFF

Regular verb: puff - puffed - puffed

Affirmation

Simple form

I must puff
you must puff
he must puff
we must puff
you must puff
they must puff

V-ing form

I must be puffing
you must be puffing
he must be puffing
we must be puffing
you must be puffing
they must be puffing

Perfect

I must have puffed
you must have puffed
he must have puffed
we must have puffed
you must have puffed
they must have puffed

V-ing perfect

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

Negation

Simple form

I must not puff
you must not puff
he must not puff
we must not puff
you must not puff
they must not puff

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I puff?
must you puff?
must he puff?
must we puff?
must you puff?
must they puff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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