English verb conjugation MUST INTERVENE

Regular verb: intervene - intervened - intervened

Affirmation

Simple form

I must intervene
you must intervene
she must intervene
we must intervene
you must intervene
they must intervene

V-ing form

I must be intervening
you must be intervening
she must be intervening
we must be intervening
you must be intervening
they must be intervening

Perfect

I must have intervened
you must have intervened
she must have intervened
we must have intervened
you must have intervened
they must have intervened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I intervene?
must you intervene?
must she intervene?
must we intervene?
must you intervene?
must they intervene?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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