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 couldn't sicken
you couldn't sicken
she couldn't sicken
we couldn't sicken
you couldn't sicken
they couldn't sicken

V-ing form

I couldn't be sickening
you couldn't be sickening
she couldn't be sickening
we couldn't be sickening
you couldn't be sickening
they couldn't be sickening

Perfect

I couldn't have sickened
you couldn't have sickened
she couldn't have sickened
we couldn't have sickened
you couldn't have sickened
they couldn't have sickened

V-ing perfect

I couldn't have been sickening
you couldn't have been sickening
she couldn't have been sickening
we couldn't have been sickening
you couldn't have been sickening
they couldn't 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

couldn't I sicken?
couldn't you sicken?
couldn't she sicken?
couldn't we sicken?
couldn't you sicken?
couldn't they sicken?

V-ing form

couldn't I be sickening?
couldn't you be sickening?
couldn't she be sickening?
couldn't we be sickening?
couldn't you be sickening?
couldn't they be sickening?

Perfect

couldn't I have sickened?
couldn't you have sickened?
couldn't she have sickened?
couldn't we have sickened?
couldn't you have sickened?
couldn't they have sickened?

V-ing perfect

couldn't I have been sickening?
couldn't you have been sickening?
couldn't she have been sickening?
couldn't we have been sickening?
couldn't you have been sickening?
couldn't they have been sickening?

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