English verb conjugation
COULD REDDEN

Regular verb: redden - reddened - reddened

Affirmation

Simple form	V-ing form
I could redden you could redden he could redden we could redden you could redden they could redden	I could be reddening you could be reddening he could be reddening we could be reddening you could be reddening they could be reddening
Perfect	V-ing perfect
I could have reddened you could have reddened he could have reddened we could have reddened you could have reddened they could have reddened	I could have been reddening you could have been reddening he could have been reddening we could have been reddening you could have been reddening they could have been reddening

Negation

Simple form	V-ing form
I could not redden you could not redden he could not redden we could not redden you could not redden they could not redden	I could not be reddening you could not be reddening he could not be reddening we could not be reddening you could not be reddening they could not be reddening
Perfect	V-ing perfect
I could not have reddened you could not have reddened he could not have reddened we could not have reddened you could not have reddened they could not have reddened	I could not have been reddening you could not have been reddening he could not have been reddening we could not have been reddening you could not have been reddening they could not have been reddening

Interrogative form

Simple form	V-ing form
could I redden? could you redden? could he redden? could we redden? could you redden? could they redden?	could I be reddening? could you be reddening? could he be reddening? could we be reddening? could you be reddening? could they be reddening?
Perfect	V-ing perfect
could I have reddened? could you have reddened? could he have reddened? could we have reddened? could you have reddened? could they have reddened?	could I have been reddening? could you have been reddening? could he have been reddening? could we have been reddening? could you have been reddening? could they have been reddening?

Interro-negative form

Simple form	V-ing form
could I not redden? could you not redden? could he not redden? could we not redden? could you not redden? could they not redden?	could I not be reddening? could you not be reddening? could he not be reddening? could we not be reddening? could you not be reddening? could they not be reddening?
Perfect	V-ing perfect
could I not have reddened? could you not have reddened? could he not have reddened? could we not have reddened? could you not have reddened? could they not have reddened?	could I not have been reddening? could you not have been reddening? could he not have been reddening? could we not have been reddening? could you not have been reddening? could they not have been reddening?