I could overwind you could overwind he could overwind we could overwind you could overwind they could overwind
V-ing form
I could be overwinding you could be overwinding he could be overwinding we could be overwinding you could be overwinding they could be overwinding
Perfect
I could have overwinded you could have overwinded he could have overwinded we could have overwinded you could have overwinded they could have overwinded
V-ing perfect
I could have been overwinding you could have been overwinding he could have been overwinding we could have been overwinding you could have been overwinding they could have been overwinding
Negation
Simple form
I could not overwind you could not overwind he could not overwind we could not overwind you could not overwind they could not overwind
V-ing form
I could not be overwinding you could not be overwinding he could not be overwinding we could not be overwinding you could not be overwinding they could not be overwinding
Perfect
I could not have overwinded you could not have overwinded he could not have overwinded we could not have overwinded you could not have overwinded they could not have overwinded
V-ing perfect
I could not have been overwinding you could not have been overwinding he could not have been overwinding we could not have been overwinding you could not have been overwinding they could not have been overwinding
Interrogative form
Simple form
could I overwind? could you overwind? could he overwind? could we overwind? could you overwind? could they overwind?
V-ing form
could I be overwinding? could you be overwinding? could he be overwinding? could we be overwinding? could you be overwinding? could they be overwinding?
Perfect
could I have overwinded? could you have overwinded? could he have overwinded? could we have overwinded? could you have overwinded? could they have overwinded?
V-ing perfect
could I have been overwinding? could you have been overwinding? could he have been overwinding? could we have been overwinding? could you have been overwinding? could they have been overwinding?
Interro-negative form
Simple form
could I not overwind? could you not overwind? could he not overwind? could we not overwind? could you not overwind? could they not overwind?
V-ing form
could I not be overwinding? could you not be overwinding? could he not be overwinding? could we not be overwinding? could you not be overwinding? could they not be overwinding?
Perfect
could I not have overwinded? could you not have overwinded? could he not have overwinded? could we not have overwinded? could you not have overwinded? could they not have overwinded?
V-ing perfect
could I not have been overwinding? could you not have been overwinding? could he not have been overwinding? could we not have been overwinding? could you not have been overwinding? could they not have been overwinding?