English verb conjugation
COULD REMEMBER

Regular verb: remember - remembered - remembered

Affirmation

Simple form	V-ing form
I could remember you could remember he could remember we could remember you could remember they could remember	I could be remembering you could be remembering he could be remembering we could be remembering you could be remembering they could be remembering
Perfect	V-ing perfect
I could have remembered you could have remembered he could have remembered we could have remembered you could have remembered they could have remembered	I could have been remembering you could have been remembering he could have been remembering we could have been remembering you could have been remembering they could have been remembering

Negation

Simple form	V-ing form
I could not remember you could not remember he could not remember we could not remember you could not remember they could not remember	I could not be remembering you could not be remembering he could not be remembering we could not be remembering you could not be remembering they could not be remembering
Perfect	V-ing perfect
I could not have remembered you could not have remembered he could not have remembered we could not have remembered you could not have remembered they could not have remembered	I could not have been remembering you could not have been remembering he could not have been remembering we could not have been remembering you could not have been remembering they could not have been remembering

Interrogative form

Simple form	V-ing form
could I remember? could you remember? could he remember? could we remember? could you remember? could they remember?	could I be remembering? could you be remembering? could he be remembering? could we be remembering? could you be remembering? could they be remembering?
Perfect	V-ing perfect
could I have remembered? could you have remembered? could he have remembered? could we have remembered? could you have remembered? could they have remembered?	could I have been remembering? could you have been remembering? could he have been remembering? could we have been remembering? could you have been remembering? could they have been remembering?

Interro-negative form

Simple form	V-ing form
could I not remember? could you not remember? could he not remember? could we not remember? could you not remember? could they not remember?	could I not be remembering? could you not be remembering? could he not be remembering? could we not be remembering? could you not be remembering? could they not be remembering?
Perfect	V-ing perfect
could I not have remembered? could you not have remembered? could he not have remembered? could we not have remembered? could you not have remembered? could they not have remembered?	could I not have been remembering? could you not have been remembering? could he not have been remembering? could we not have been remembering? could you not have been remembering? could they not have been remembering?