English verb conjugation MUST RETROGRESS

Regular verb: retrogress - retrogressed - retrogressed

Affirmation

Simple form

I must retrogress
you must retrogress
he must retrogress
we must retrogress
you must retrogress
they must retrogress

V-ing form

I must be retrogressing
you must be retrogressing
he must be retrogressing
we must be retrogressing
you must be retrogressing
they must be retrogressing

Perfect

I must have retrogressed
you must have retrogressed
he must have retrogressed
we must have retrogressed
you must have retrogressed
they must have retrogressed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I retrogress?
must you retrogress?
must he retrogress?
must we retrogress?
must you retrogress?
must they retrogress?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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