English verb conjugation MUST DECREASE

Regular verb: decrease - decreased - decreased

Affirmation

Simple form

I must decrease
you must decrease
he must decrease
we must decrease
you must decrease
they must decrease

V-ing form

I must be decreasing
you must be decreasing
he must be decreasing
we must be decreasing
you must be decreasing
they must be decreasing

Perfect

I must have decreased
you must have decreased
he must have decreased
we must have decreased
you must have decreased
they must have decreased

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I decrease?
must you decrease?
must he decrease?
must we decrease?
must you decrease?
must they decrease?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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