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 must not quack
you must not quack
she must not quack
we must not quack
you must not quack
they must not quack

V-ing form

I must not be quacking
you must not be quacking
she must not be quacking
we must not be quacking
you must not be quacking
they must not be quacking

Perfect

I must not have quacked
you must not have quacked
she must not have quacked
we must not have quacked
you must not have quacked
they must not have quacked

V-ing perfect

I must not have been quacking
you must not have been quacking
she must not have been quacking
we must not have been quacking
you must not have been quacking
they must not 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

must I not quack?
must you not quack?
must she not quack?
must we not quack?
must you not quack?
must they not quack?

V-ing form

must I not be quacking?
must you not be quacking?
must she not be quacking?
must we not be quacking?
must you not be quacking?
must they not be quacking?

Perfect

must I not have quacked?
must you not have quacked?
must she not have quacked?
must we not have quacked?
must you not have quacked?
must they not have quacked?

V-ing perfect

must I not have been quacking?
must you not have been quacking?
must she not have been quacking?
must we not have been quacking?
must you not have been quacking?
must they not have been quacking?

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