English verb conjugation MUST SIFT

Regular verb: sift - sifted - sifted

Affirmation

Simple form

I must sift
you must sift
she must sift
we must sift
you must sift
they must sift

V-ing form

I must be sifting
you must be sifting
she must be sifting
we must be sifting
you must be sifting
they must be sifting

Perfect

I must have sifted
you must have sifted
she must have sifted
we must have sifted
you must have sifted
they must have sifted

V-ing perfect

I must have been sifting
you must have been sifting
she must have been sifting
we must have been sifting
you must have been sifting
they must have been sifting

Negation

Simple form

I mustn't sift
you mustn't sift
she mustn't sift
we mustn't sift
you mustn't sift
they mustn't sift

V-ing form

I mustn't be sifting
you mustn't be sifting
she mustn't be sifting
we mustn't be sifting
you mustn't be sifting
they mustn't be sifting

Perfect

I mustn't have sifted
you mustn't have sifted
she mustn't have sifted
we mustn't have sifted
you mustn't have sifted
they mustn't have sifted

V-ing perfect

I mustn't have been sifting
you mustn't have been sifting
she mustn't have been sifting
we mustn't have been sifting
you mustn't have been sifting
they mustn't have been sifting

Interrogative form

Simple form

must I sift?
must you sift?
must she sift?
must we sift?
must you sift?
must they sift?

V-ing form

must I be sifting?
must you be sifting?
must she be sifting?
must we be sifting?
must you be sifting?
must they be sifting?

Perfect

must I have sifted?
must you have sifted?
must she have sifted?
must we have sifted?
must you have sifted?
must they have sifted?

V-ing perfect

must I have been sifting?
must you have been sifting?
must she have been sifting?
must we have been sifting?
must you have been sifting?
must they have been sifting?

Interro-negative form

Simple form

mustn't I sift?
mustn't you sift?
mustn't she sift?
mustn't we sift?
mustn't you sift?
mustn't they sift?

V-ing form

mustn't I be sifting?
mustn't you be sifting?
mustn't she be sifting?
mustn't we be sifting?
mustn't you be sifting?
mustn't they be sifting?

Perfect

mustn't I have sifted?
mustn't you have sifted?
mustn't she have sifted?
mustn't we have sifted?
mustn't you have sifted?
mustn't they have sifted?

V-ing perfect

mustn't I have been sifting?
mustn't you have been sifting?
mustn't she have been sifting?
mustn't we have been sifting?
mustn't you have been sifting?
mustn't they have been sifting?

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