English verb conjugation MUST MUFF

Regular verb: muff - muffed - muffed

Affirmation

Simple form

I must muff
you must muff
she must muff
we must muff
you must muff
they must muff

V-ing form

I must be muffing
you must be muffing
she must be muffing
we must be muffing
you must be muffing
they must be muffing

Perfect

I must have muffed
you must have muffed
she must have muffed
we must have muffed
you must have muffed
they must have muffed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I muff?
must you muff?
must she muff?
must we muff?
must you muff?
must they muff?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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