English verb conjugation COULD SICKEN

Regular verb: sicken - sickened - sickened

Affirmation

Simple form

I could sicken
you could sicken
she could sicken
we could sicken
you could sicken
they could sicken

V-ing form

I could be sickening
you could be sickening
she could be sickening
we could be sickening
you could be sickening
they could be sickening

Perfect

I could have sickened
you could have sickened
she could have sickened
we could have sickened
you could have sickened
they could have sickened

V-ing perfect

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

Negation

Simple form

I could not sicken
you could not sicken
she could not sicken
we could not sicken
you could not sicken
they could not sicken

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I sicken?
could you sicken?
could she sicken?
could we sicken?
could you sicken?
could they sicken?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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