English verb conjugation MUST PIERCE

Regular verb: pierce - pierced - pierced

Affirmation

Simple form

I must pierce
you must pierce
he must pierce
we must pierce
you must pierce
they must pierce

V-ing form

I must be piercing
you must be piercing
he must be piercing
we must be piercing
you must be piercing
they must be piercing

Perfect

I must have pierced
you must have pierced
he must have pierced
we must have pierced
you must have pierced
they must have pierced

V-ing perfect

I must have been piercing
you must have been piercing
he must have been piercing
we must have been piercing
you must have been piercing
they must have been piercing

Negation

Simple form

I mustn't pierce
you mustn't pierce
he mustn't pierce
we mustn't pierce
you mustn't pierce
they mustn't pierce

V-ing form

I mustn't be piercing
you mustn't be piercing
he mustn't be piercing
we mustn't be piercing
you mustn't be piercing
they mustn't be piercing

Perfect

I mustn't have pierced
you mustn't have pierced
he mustn't have pierced
we mustn't have pierced
you mustn't have pierced
they mustn't have pierced

V-ing perfect

I mustn't have been piercing
you mustn't have been piercing
he mustn't have been piercing
we mustn't have been piercing
you mustn't have been piercing
they mustn't have been piercing

Interrogative form

Simple form

must I pierce?
must you pierce?
must he pierce?
must we pierce?
must you pierce?
must they pierce?

V-ing form

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

Perfect

must I have pierced?
must you have pierced?
must he have pierced?
must we have pierced?
must you have pierced?
must they have pierced?

V-ing perfect

must I have been piercing?
must you have been piercing?
must he have been piercing?
must we have been piercing?
must you have been piercing?
must they have been piercing?

Interro-negative form

Simple form

mustn't I pierce?
mustn't you pierce?
mustn't he pierce?
mustn't we pierce?
mustn't you pierce?
mustn't they pierce?

V-ing form

mustn't I be piercing?
mustn't you be piercing?
mustn't he be piercing?
mustn't we be piercing?
mustn't you be piercing?
mustn't they be piercing?

Perfect

mustn't I have pierced?
mustn't you have pierced?
mustn't he have pierced?
mustn't we have pierced?
mustn't you have pierced?
mustn't they have pierced?

V-ing perfect

mustn't I have been piercing?
mustn't you have been piercing?
mustn't he have been piercing?
mustn't we have been piercing?
mustn't you have been piercing?
mustn't they have been piercing?

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