English verb conjugation
COULD DEFOG

Regular verb: defog - defoged - defoged

Affirmation

Simple form	V-ing form
I could defog you could defog he could defog we could defog you could defog they could defog	I could be defoging you could be defoging he could be defoging we could be defoging you could be defoging they could be defoging
Perfect	V-ing perfect
I could have defoged you could have defoged he could have defoged we could have defoged you could have defoged they could have defoged	I could have been defoging you could have been defoging he could have been defoging we could have been defoging you could have been defoging they could have been defoging

Negation

Simple form	V-ing form
I could not defog you could not defog he could not defog we could not defog you could not defog they could not defog	I could not be defoging you could not be defoging he could not be defoging we could not be defoging you could not be defoging they could not be defoging
Perfect	V-ing perfect
I could not have defoged you could not have defoged he could not have defoged we could not have defoged you could not have defoged they could not have defoged	I could not have been defoging you could not have been defoging he could not have been defoging we could not have been defoging you could not have been defoging they could not have been defoging

Interrogative form

Simple form	V-ing form
could I defog? could you defog? could he defog? could we defog? could you defog? could they defog?	could I be defoging? could you be defoging? could he be defoging? could we be defoging? could you be defoging? could they be defoging?
Perfect	V-ing perfect
could I have defoged? could you have defoged? could he have defoged? could we have defoged? could you have defoged? could they have defoged?	could I have been defoging? could you have been defoging? could he have been defoging? could we have been defoging? could you have been defoging? could they have been defoging?

Interro-negative form

Simple form	V-ing form
could I not defog? could you not defog? could he not defog? could we not defog? could you not defog? could they not defog?	could I not be defoging? could you not be defoging? could he not be defoging? could we not be defoging? could you not be defoging? could they not be defoging?
Perfect	V-ing perfect
could I not have defoged? could you not have defoged? could he not have defoged? could we not have defoged? could you not have defoged? could they not have defoged?	could I not have been defoging? could you not have been defoging? could he not have been defoging? could we not have been defoging? could you not have been defoging? could they not have been defoging?