English verb conjugation MUST SKULK

Regular verb: skulk - skulked - skulked

Affirmation

Simple form

I must skulk
you must skulk
he must skulk
we must skulk
you must skulk
they must skulk

V-ing form

I must be skulking
you must be skulking
he must be skulking
we must be skulking
you must be skulking
they must be skulking

Perfect

I must have skulked
you must have skulked
he 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
he 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
he 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
he 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
he 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
he 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 he skulk?
must we skulk?
must you skulk?
must they skulk?

V-ing form

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

Perfect

must I have skulked?
must you have skulked?
must he 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 he 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 he 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 he 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 he 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 he 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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