English verb conjugation
COULD PREWARM

Regular verb: prewarm - prewarmed - prewarmed

Affirmation

Simple form	V-ing form
I could prewarm you could prewarm he could prewarm we could prewarm you could prewarm they could prewarm	I could be prewarming you could be prewarming he could be prewarming we could be prewarming you could be prewarming they could be prewarming
Perfect	V-ing perfect
I could have prewarmed you could have prewarmed he could have prewarmed we could have prewarmed you could have prewarmed they could have prewarmed	I could have been prewarming you could have been prewarming he could have been prewarming we could have been prewarming you could have been prewarming they could have been prewarming

Negation

Simple form	V-ing form
I could not prewarm you could not prewarm he could not prewarm we could not prewarm you could not prewarm they could not prewarm	I could not be prewarming you could not be prewarming he could not be prewarming we could not be prewarming you could not be prewarming they could not be prewarming
Perfect	V-ing perfect
I could not have prewarmed you could not have prewarmed he could not have prewarmed we could not have prewarmed you could not have prewarmed they could not have prewarmed	I could not have been prewarming you could not have been prewarming he could not have been prewarming we could not have been prewarming you could not have been prewarming they could not have been prewarming

Interrogative form

Simple form	V-ing form
could I prewarm? could you prewarm? could he prewarm? could we prewarm? could you prewarm? could they prewarm?	could I be prewarming? could you be prewarming? could he be prewarming? could we be prewarming? could you be prewarming? could they be prewarming?
Perfect	V-ing perfect
could I have prewarmed? could you have prewarmed? could he have prewarmed? could we have prewarmed? could you have prewarmed? could they have prewarmed?	could I have been prewarming? could you have been prewarming? could he have been prewarming? could we have been prewarming? could you have been prewarming? could they have been prewarming?

Interro-negative form

Simple form	V-ing form
could I not prewarm? could you not prewarm? could he not prewarm? could we not prewarm? could you not prewarm? could they not prewarm?	could I not be prewarming? could you not be prewarming? could he not be prewarming? could we not be prewarming? could you not be prewarming? could they not be prewarming?
Perfect	V-ing perfect
could I not have prewarmed? could you not have prewarmed? could he not have prewarmed? could we not have prewarmed? could you not have prewarmed? could they not have prewarmed?	could I not have been prewarming? could you not have been prewarming? could he not have been prewarming? could we not have been prewarming? could you not have been prewarming? could they not have been prewarming?