English verb conjugation MUST QUAIL

Regular verb: quail - quailed - quailed

Affirmation

Simple form

I must quail
you must quail
she must quail
we must quail
you must quail
they must quail

V-ing form

I must be quailing
you must be quailing
she must be quailing
we must be quailing
you must be quailing
they must be quailing

Perfect

I must have quailed
you must have quailed
she must have quailed
we must have quailed
you must have quailed
they must have quailed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I quail?
must you quail?
must she quail?
must we quail?
must you quail?
must they quail?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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