English verb conjugation COULD SICKEN

Regular verb: sicken - sickened - sickened

Affirmation

Simple form

I could sicken
you could sicken
he could sicken
we could sicken
you could sicken
they could sicken

V-ing form

I could be sickening
you could be sickening
he could be sickening
we could be sickening
you could be sickening
they could be sickening

Perfect

I could have sickened
you could have sickened
he 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
he 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
he 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
he 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
he 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
he 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 he sicken?
could we sicken?
could you sicken?
could they sicken?

V-ing form

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

Perfect

could I have sickened?
could you have sickened?
could he 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 he 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 he 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 he 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 he 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 he 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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