English verb conjugation MUST SKI

Regular verb: ski - skied - skied

Affirmation

Simple form

I must ski
you must ski
he must ski
we must ski
you must ski
they must ski

V-ing form

I must be skiing
you must be skiing
he must be skiing
we must be skiing
you must be skiing
they must be skiing

Perfect

I must have skied
you must have skied
he must have skied
we must have skied
you must have skied
they must have skied

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I ski?
must you ski?
must he ski?
must we ski?
must you ski?
must they ski?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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