English verb conjugation MUST MASK

Regular verb: mask - masked - masked

Affirmation

Simple form

I must mask
you must mask
he must mask
we must mask
you must mask
they must mask

V-ing form

I must be masking
you must be masking
he must be masking
we must be masking
you must be masking
they must be masking

Perfect

I must have masked
you must have masked
he must have masked
we must have masked
you must have masked
they must have masked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I mask?
must you mask?
must he mask?
must we mask?
must you mask?
must they mask?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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