English verb conjugation
COULD QUIET

Regular verb: quiet - quieted - quieted

Affirmation

Simple form	V-ing form
I could quiet you could quiet he could quiet we could quiet you could quiet they could quiet	I could be quieting you could be quieting he could be quieting we could be quieting you could be quieting they could be quieting
Perfect	V-ing perfect
I could have quieted you could have quieted he could have quieted we could have quieted you could have quieted they could have quieted	I could have been quieting you could have been quieting he could have been quieting we could have been quieting you could have been quieting they could have been quieting

Negation

Simple form	V-ing form
I could not quiet you could not quiet he could not quiet we could not quiet you could not quiet they could not quiet	I could not be quieting you could not be quieting he could not be quieting we could not be quieting you could not be quieting they could not be quieting
Perfect	V-ing perfect
I could not have quieted you could not have quieted he could not have quieted we could not have quieted you could not have quieted they could not have quieted	I could not have been quieting you could not have been quieting he could not have been quieting we could not have been quieting you could not have been quieting they could not have been quieting

Interrogative form

Simple form	V-ing form
could I quiet? could you quiet? could he quiet? could we quiet? could you quiet? could they quiet?	could I be quieting? could you be quieting? could he be quieting? could we be quieting? could you be quieting? could they be quieting?
Perfect	V-ing perfect
could I have quieted? could you have quieted? could he have quieted? could we have quieted? could you have quieted? could they have quieted?	could I have been quieting? could you have been quieting? could he have been quieting? could we have been quieting? could you have been quieting? could they have been quieting?

Interro-negative form

Simple form	V-ing form
could I not quiet? could you not quiet? could he not quiet? could we not quiet? could you not quiet? could they not quiet?	could I not be quieting? could you not be quieting? could he not be quieting? could we not be quieting? could you not be quieting? could they not be quieting?
Perfect	V-ing perfect
could I not have quieted? could you not have quieted? could he not have quieted? could we not have quieted? could you not have quieted? could they not have quieted?	could I not have been quieting? could you not have been quieting? could he not have been quieting? could we not have been quieting? could you not have been quieting? could they not have been quieting?