English verb conjugation MUST SIGHTSEE

Regular verb: sightsee - sightseed - sightseed

Affirmation

Simple form

I must sightsee
you must sightsee
he must sightsee
we must sightsee
you must sightsee
they must sightsee

V-ing form

I must be sightseeing
you must be sightseeing
he must be sightseeing
we must be sightseeing
you must be sightseeing
they must be sightseeing

Perfect

I must have sightseed
you must have sightseed
he must have sightseed
we must have sightseed
you must have sightseed
they must have sightseed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I sightsee?
must you sightsee?
must he sightsee?
must we sightsee?
must you sightsee?
must they sightsee?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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