English verb conjugation MUST BUTTRESS

Regular verb: buttress - buttressed - buttressed

Affirmation

Simple form

I must buttress
you must buttress
she must buttress
we must buttress
you must buttress
they must buttress

V-ing form

I must be buttressing
you must be buttressing
she must be buttressing
we must be buttressing
you must be buttressing
they must be buttressing

Perfect

I must have buttressed
you must have buttressed
she must have buttressed
we must have buttressed
you must have buttressed
they must have buttressed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I buttress?
must you buttress?
must she buttress?
must we buttress?
must you buttress?
must they buttress?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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