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 couldn't prewarm you couldn't prewarm he couldn't prewarm we couldn't prewarm you couldn't prewarm they couldn't prewarm	I couldn't be prewarming you couldn't be prewarming he couldn't be prewarming we couldn't be prewarming you couldn't be prewarming they couldn't be prewarming
Perfect	V-ing perfect
I couldn't have prewarmed you couldn't have prewarmed he couldn't have prewarmed we couldn't have prewarmed you couldn't have prewarmed they couldn't have prewarmed	I couldn't have been prewarming you couldn't have been prewarming he couldn't have been prewarming we couldn't have been prewarming you couldn't have been prewarming they couldn't 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
couldn't I prewarm? couldn't you prewarm? couldn't he prewarm? couldn't we prewarm? couldn't you prewarm? couldn't they prewarm?	couldn't I be prewarming? couldn't you be prewarming? couldn't he be prewarming? couldn't we be prewarming? couldn't you be prewarming? couldn't they be prewarming?
Perfect	V-ing perfect
couldn't I have prewarmed? couldn't you have prewarmed? couldn't he have prewarmed? couldn't we have prewarmed? couldn't you have prewarmed? couldn't they have prewarmed?	couldn't I have been prewarming? couldn't you have been prewarming? couldn't he have been prewarming? couldn't we have been prewarming? couldn't you have been prewarming? couldn't they have been prewarming?