English verb conjugation CAN SIGHTSEE

Regular verb: sightsee - sightseed - sightseed

Affirmation

Simple form

I can sightsee
you can sightsee
he can sightsee
we can sightsee
you can sightsee
they can sightsee

V-ing form

I can be sightseeing
you can be sightseeing
he can be sightseeing
we can be sightseeing
you can be sightseeing
they can be sightseeing

Perfect

I can have sightseed
you can have sightseed
he can have sightseed
we can have sightseed
you can have sightseed
they can have sightseed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

can I sightsee?
can you sightsee?
can he sightsee?
can we sightsee?
can you sightsee?
can they sightsee?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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