English verb conjugation COULD SISE

Regular verb: sise - sised - sised

Affirmation

Simple form

I could sise
you could sise
he could sise
we could sise
you could sise
they could sise

V-ing form

I could be sising
you could be sising
he could be sising
we could be sising
you could be sising
they could be sising

Perfect

I could have sised
you could have sised
he could have sised
we could have sised
you could have sised
they could have sised

V-ing perfect

I could have been sising
you could have been sising
he could have been sising
we could have been sising
you could have been sising
they could have been sising

Negation

Simple form

I could not sise
you could not sise
he could not sise
we could not sise
you could not sise
they could not sise

V-ing form

I could not be sising
you could not be sising
he could not be sising
we could not be sising
you could not be sising
they could not be sising

Perfect

I could not have sised
you could not have sised
he could not have sised
we could not have sised
you could not have sised
they could not have sised

V-ing perfect

I could not have been sising
you could not have been sising
he could not have been sising
we could not have been sising
you could not have been sising
they could not have been sising

Interrogative form

Simple form

could I sise?
could you sise?
could he sise?
could we sise?
could you sise?
could they sise?

V-ing form

could I be sising?
could you be sising?
could he be sising?
could we be sising?
could you be sising?
could they be sising?

Perfect

could I have sised?
could you have sised?
could he have sised?
could we have sised?
could you have sised?
could they have sised?

V-ing perfect

could I have been sising?
could you have been sising?
could he have been sising?
could we have been sising?
could you have been sising?
could they have been sising?

Interro-negative form

Simple form

could I not sise?
could you not sise?
could he not sise?
could we not sise?
could you not sise?
could they not sise?

V-ing form

could I not be sising?
could you not be sising?
could he not be sising?
could we not be sising?
could you not be sising?
could they not be sising?

Perfect

could I not have sised?
could you not have sised?
could he not have sised?
could we not have sised?
could you not have sised?
could they not have sised?

V-ing perfect

could I not have been sising?
could you not have been sising?
could he not have been sising?
could we not have been sising?
could you not have been sising?
could they not have been sising?

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