English verb conjugation
CAN QUIVER

Regular verb: quiver - quivered - quivered

Affirmation

Simple form	V-ing form
I can quiver you can quiver he can quiver we can quiver you can quiver they can quiver	I can be quivering you can be quivering he can be quivering we can be quivering you can be quivering they can be quivering
Perfect	V-ing perfect
I can have quivered you can have quivered he can have quivered we can have quivered you can have quivered they can have quivered	I can have been quivering you can have been quivering he can have been quivering we can have been quivering you can have been quivering they can have been quivering

Negation

Simple form	V-ing form
I can't quiver you can't quiver he can't quiver we can't quiver you can't quiver they can't quiver	I can't be quivering you can't be quivering he can't be quivering we can't be quivering you can't be quivering they can't be quivering
Perfect	V-ing perfect
I can't have quivered you can't have quivered he can't have quivered we can't have quivered you can't have quivered they can't have quivered	I can't have been quivering you can't have been quivering he can't have been quivering we can't have been quivering you can't have been quivering they can't have been quivering

Interrogative form

Simple form	V-ing form
can I quiver? can you quiver? can he quiver? can we quiver? can you quiver? can they quiver?	can I be quivering? can you be quivering? can he be quivering? can we be quivering? can you be quivering? can they be quivering?
Perfect	V-ing perfect
can I have quivered? can you have quivered? can he have quivered? can we have quivered? can you have quivered? can they have quivered?	can I have been quivering? can you have been quivering? can he have been quivering? can we have been quivering? can you have been quivering? can they have been quivering?

Interro-negative form

Simple form	V-ing form
can't I quiver? can't you quiver? can't he quiver? can't we quiver? can't you quiver? can't they quiver?	can't I be quivering? can't you be quivering? can't he be quivering? can't we be quivering? can't you be quivering? can't they be quivering?
Perfect	V-ing perfect
can't I have quivered? can't you have quivered? can't he have quivered? can't we have quivered? can't you have quivered? can't they have quivered?	can't I have been quivering? can't you have been quivering? can't he have been quivering? can't we have been quivering? can't you have been quivering? can't they have been quivering?