English verb conjugation COULD SIGHTSEE

Regular verb: sightsee - sightseed - sightseed

Affirmation

Simple form

I could sightsee
you could sightsee
she could sightsee
we could sightsee
you could sightsee
they could sightsee

V-ing form

I could be sightseeing
you could be sightseeing
she could be sightseeing
we could be sightseeing
you could be sightseeing
they could be sightseeing

Perfect

I could have sightseed
you could have sightseed
she could have sightseed
we could have sightseed
you could have sightseed
they could have sightseed

V-ing perfect

I could have been sightseeing
you could have been sightseeing
she could have been sightseeing
we could have been sightseeing
you could have been sightseeing
they could have been sightseeing

Negation

Simple form

I could not sightsee
you could not sightsee
she could not sightsee
we could not sightsee
you could not sightsee
they could not sightsee

V-ing form

I could not be sightseeing
you could not be sightseeing
she could not be sightseeing
we could not be sightseeing
you could not be sightseeing
they could not be sightseeing

Perfect

I could not have sightseed
you could not have sightseed
she could not have sightseed
we could not have sightseed
you could not have sightseed
they could not have sightseed

V-ing perfect

I could not have been sightseeing
you could not have been sightseeing
she could not have been sightseeing
we could not have been sightseeing
you could not have been sightseeing
they could not have been sightseeing

Interrogative form

Simple form

could I sightsee?
could you sightsee?
could she sightsee?
could we sightsee?
could you sightsee?
could they sightsee?

V-ing form

could I be sightseeing?
could you be sightseeing?
could she be sightseeing?
could we be sightseeing?
could you be sightseeing?
could they be sightseeing?

Perfect

could I have sightseed?
could you have sightseed?
could she have sightseed?
could we have sightseed?
could you have sightseed?
could they have sightseed?

V-ing perfect

could I have been sightseeing?
could you have been sightseeing?
could she have been sightseeing?
could we have been sightseeing?
could you have been sightseeing?
could they have been sightseeing?

Interro-negative form

Simple form

could I not sightsee?
could you not sightsee?
could she not sightsee?
could we not sightsee?
could you not sightsee?
could they not sightsee?

V-ing form

could I not be sightseeing?
could you not be sightseeing?
could she not be sightseeing?
could we not be sightseeing?
could you not be sightseeing?
could they not be sightseeing?

Perfect

could I not have sightseed?
could you not have sightseed?
could she not have sightseed?
could we not have sightseed?
could you not have sightseed?
could they not have sightseed?

V-ing perfect

could I not have been sightseeing?
could you not have been sightseeing?
could she not have been sightseeing?
could we not have been sightseeing?
could you not have been sightseeing?
could they not have been sightseeing?

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