English verb conjugation MUST QUACK

Regular verb: quack - quacked - quacked

Affirmation

Simple form

I must quack
you must quack
she must quack
we must quack
you must quack
they must quack

V-ing form

I must be quacking
you must be quacking
she must be quacking
we must be quacking
you must be quacking
they must be quacking

Perfect

I must have quacked
you must have quacked
she must have quacked
we must have quacked
you must have quacked
they must have quacked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I quack?
must you quack?
must she quack?
must we quack?
must you quack?
must they quack?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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