I could quiver you could quiver she could quiver we could quiver you could quiver they could quiver
Forma com V-ing
I could be quivering you could be quivering she could be quivering we could be quivering you could be quivering they could be quivering
Perfeito
I could have quivered you could have quivered she could have quivered we could have quivered you could have quivered they could have quivered
Perfeito com V-ing
I could have been quivering you could have been quivering she could have been quivering we could have been quivering you could have been quivering they could have been quivering
Negação
Forma simple
I couldn't quiver you couldn't quiver she couldn't quiver we couldn't quiver you couldn't quiver they couldn't quiver
Forma com V-ing
I couldn't be quivering you couldn't be quivering she couldn't be quivering we couldn't be quivering you couldn't be quivering they couldn't be quivering
Perfeito
I couldn't have quivered you couldn't have quivered she couldn't have quivered we couldn't have quivered you couldn't have quivered they couldn't have quivered
Perfeito com V-ing
I couldn't have been quivering you couldn't have been quivering she couldn't have been quivering we couldn't have been quivering you couldn't have been quivering they couldn't have been quivering
Forma interrogativa
Forma simple
could I quiver? could you quiver? could she quiver? could we quiver? could you quiver? could they quiver?
Forma com V-ing
could I be quivering? could you be quivering? could she be quivering? could we be quivering? could you be quivering? could they be quivering?
Perfeito
could I have quivered? could you have quivered? could she have quivered? could we have quivered? could you have quivered? could they have quivered?
Perfeito com V-ing
could I have been quivering? could you have been quivering? could she have been quivering? could we have been quivering? could you have been quivering? could they have been quivering?
Forma interro-Negação
Forma simple
couldn't I quiver? couldn't you quiver? couldn't she quiver? couldn't we quiver? couldn't you quiver? couldn't they quiver?
Forma com V-ing
couldn't I be quivering? couldn't you be quivering? couldn't she be quivering? couldn't we be quivering? couldn't you be quivering? couldn't they be quivering?
Perfeito
couldn't I have quivered? couldn't you have quivered? couldn't she have quivered? couldn't we have quivered? couldn't you have quivered? couldn't they have quivered?
Perfeito com V-ing
couldn't I have been quivering? couldn't you have been quivering? couldn't she have been quivering? couldn't we have been quivering? couldn't you have been quivering? couldn't they have been quivering?