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 mustn't puff
you mustn't puff
he mustn't puff
we mustn't puff
you mustn't puff
they mustn't puff

V-ing form

I mustn't be puffing
you mustn't be puffing
he mustn't be puffing
we mustn't be puffing
you mustn't be puffing
they mustn't be puffing

Perfect

I mustn't have puffed
you mustn't have puffed
he mustn't have puffed
we mustn't have puffed
you mustn't have puffed
they mustn't have puffed

V-ing perfect

I mustn't have been puffing
you mustn't have been puffing
he mustn't have been puffing
we mustn't have been puffing
you mustn't have been puffing
they mustn't 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

mustn't I puff?
mustn't you puff?
mustn't he puff?
mustn't we puff?
mustn't you puff?
mustn't they puff?

V-ing form

mustn't I be puffing?
mustn't you be puffing?
mustn't he be puffing?
mustn't we be puffing?
mustn't you be puffing?
mustn't they be puffing?

Perfect

mustn't I have puffed?
mustn't you have puffed?
mustn't he have puffed?
mustn't we have puffed?
mustn't you have puffed?
mustn't they have puffed?

V-ing perfect

mustn't I have been puffing?
mustn't you have been puffing?
mustn't he have been puffing?
mustn't we have been puffing?
mustn't you have been puffing?
mustn't they have been puffing?

Page top