English verb conjugation MUST IMPROVE

Regular verb: improve - improved - improved

Affirmation

Simple form

I must improve
you must improve
he must improve
we must improve
you must improve
they must improve

V-ing form

I must be improving
you must be improving
he must be improving
we must be improving
you must be improving
they must be improving

Perfect

I must have improved
you must have improved
he 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
he must have been improving
we must have been improving
you must have been improving
they must have been improving

Negation

Simple form

I must not improve
you must not improve
he must not improve
we must not improve
you must not improve
they must not improve

V-ing form

I must not be improving
you must not be improving
he must not be improving
we must not be improving
you must not be improving
they must not be improving

Perfect

I must not have improved
you must not have improved
he must not have improved
we must not have improved
you must not have improved
they must not have improved

V-ing perfect

I must not have been improving
you must not have been improving
he must not have been improving
we must not have been improving
you must not have been improving
they must not have been improving

Interrogative form

Simple form

must I improve?
must you improve?
must he improve?
must we improve?
must you improve?
must they improve?

V-ing form

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

Perfect

must I have improved?
must you have improved?
must he 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 he have been improving?
must we have been improving?
must you have been improving?
must they have been improving?

Interro-negative form

Simple form

must I not improve?
must you not improve?
must he not improve?
must we not improve?
must you not improve?
must they not improve?

V-ing form

must I not be improving?
must you not be improving?
must he not be improving?
must we not be improving?
must you not be improving?
must they not be improving?

Perfect

must I not have improved?
must you not have improved?
must he not have improved?
must we not have improved?
must you not have improved?
must they not have improved?

V-ing perfect

must I not have been improving?
must you not have been improving?
must he not have been improving?
must we not have been improving?
must you not have been improving?
must they not have been improving?

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