English verb conjugation MUST QUAIL

Regular verb: quail - quailed - quailed

Affirmation

Simple form

I must quail
you must quail
he must quail
we must quail
you must quail
they must quail

V-ing form

I must be quailing
you must be quailing
he must be quailing
we must be quailing
you must be quailing
they must be quailing

Perfect

I must have quailed
you must have quailed
he 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
he 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
he 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
he 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
he 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
he 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 he quail?
must we quail?
must you quail?
must they quail?

V-ing form

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

Perfect

must I have quailed?
must you have quailed?
must he 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 he 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 he 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 he 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 he 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 he 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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