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 couldn't remember you couldn't remember he couldn't remember we couldn't remember you couldn't remember they couldn't remember	I couldn't be remembering you couldn't be remembering he couldn't be remembering we couldn't be remembering you couldn't be remembering they couldn't be remembering
Perfect	V-ing perfect
I couldn't have remembered you couldn't have remembered he couldn't have remembered we couldn't have remembered you couldn't have remembered they couldn't have remembered	I couldn't have been remembering you couldn't have been remembering he couldn't have been remembering we couldn't have been remembering you couldn't have been remembering they couldn't 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
couldn't I remember? couldn't you remember? couldn't he remember? couldn't we remember? couldn't you remember? couldn't they remember?	couldn't I be remembering? couldn't you be remembering? couldn't he be remembering? couldn't we be remembering? couldn't you be remembering? couldn't they be remembering?
Perfect	V-ing perfect
couldn't I have remembered? couldn't you have remembered? couldn't he have remembered? couldn't we have remembered? couldn't you have remembered? couldn't they have remembered?	couldn't I have been remembering? couldn't you have been remembering? couldn't he have been remembering? couldn't we have been remembering? couldn't you have been remembering? couldn't they have been remembering?