English verb conjugation MUST OPEN

Regular verb: open - opened - opened

Affirmation

Simple form

I must open
you must open
he must open
we must open
you must open
they must open

V-ing form

I must be opening
you must be opening
he must be opening
we must be opening
you must be opening
they must be opening

Perfect

I must have opened
you must have opened
he must have opened
we must have opened
you must have opened
they must have opened

V-ing perfect

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

Negation

Simple form

I mustn't open
you mustn't open
he mustn't open
we mustn't open
you mustn't open
they mustn't open

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I open?
must you open?
must he open?
must we open?
must you open?
must they open?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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