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 must not ski
you must not ski
he must not ski
we must not ski
you must not ski
they must not ski

V-ing form

I must not be skiing
you must not be skiing
he must not be skiing
we must not be skiing
you must not be skiing
they must not be skiing

Perfect

I must not have skied
you must not have skied
he must not have skied
we must not have skied
you must not have skied
they must not have skied

V-ing perfect

I must not have been skiing
you must not have been skiing
he must not have been skiing
we must not have been skiing
you must not have been skiing
they must not 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

must I not ski?
must you not ski?
must he not ski?
must we not ski?
must you not ski?
must they not ski?

V-ing form

must I not be skiing?
must you not be skiing?
must he not be skiing?
must we not be skiing?
must you not be skiing?
must they not be skiing?

Perfect

must I not have skied?
must you not have skied?
must he not have skied?
must we not have skied?
must you not have skied?
must they not have skied?

V-ing perfect

must I not have been skiing?
must you not have been skiing?
must he not have been skiing?
must we not have been skiing?
must you not have been skiing?
must they not have been skiing?

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