English verb conjugation MUST SKULK

Regular verb: skulk - skulked - skulked

Affirmation

Simple form

I must skulk
you must skulk
she must skulk
we must skulk
you must skulk
they must skulk

V-ing form

I must be skulking
you must be skulking
she must be skulking
we must be skulking
you must be skulking
they must be skulking

Perfect

I must have skulked
you must have skulked
she must have skulked
we must have skulked
you must have skulked
they must have skulked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I skulk?
must you skulk?
must she skulk?
must we skulk?
must you skulk?
must they skulk?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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