English verb conjugation COULD QUICKEN

Regular verb: quicken - quickened - quickened

Affirmation

Simple form

I could quicken
you could quicken
he could quicken
we could quicken
you could quicken
they could quicken

V-ing form

I could be quickening
you could be quickening
he could be quickening
we could be quickening
you could be quickening
they could be quickening

Perfect

I could have quickened
you could have quickened
he could have quickened
we could have quickened
you could have quickened
they could have quickened

V-ing perfect

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

Negation

Simple form

I could not quicken
you could not quicken
he could not quicken
we could not quicken
you could not quicken
they could not quicken

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I quicken?
could you quicken?
could he quicken?
could we quicken?
could you quicken?
could they quicken?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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