English verb conjugation MUST IMPROVE

Regular verb: improve - improved - improved

Affirmation

Simple form

I must improve
you must improve
she must improve
we must improve
you must improve
they must improve

V-ing form

I must be improving
you must be improving
she must be improving
we must be improving
you must be improving
they must be improving

Perfect

I must have improved
you must have improved
she must have improved
we must have improved
you must have improved
they must have improved

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I improve?
must you improve?
must she improve?
must we improve?
must you improve?
must they improve?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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