English verb conjugation
COULD QUAVER

Regular verb: quaver - quavered - quavered

Affirmation

Simple form	V-ing form
I could quaver you could quaver she could quaver we could quaver you could quaver they could quaver	I could be quavering you could be quavering she could be quavering we could be quavering you could be quavering they could be quavering
Perfect	V-ing perfect
I could have quavered you could have quavered she could have quavered we could have quavered you could have quavered they could have quavered	I could have been quavering you could have been quavering she could have been quavering we could have been quavering you could have been quavering they could have been quavering

Negation

Simple form	V-ing form
I couldn't quaver you couldn't quaver she couldn't quaver we couldn't quaver you couldn't quaver they couldn't quaver	I couldn't be quavering you couldn't be quavering she couldn't be quavering we couldn't be quavering you couldn't be quavering they couldn't be quavering
Perfect	V-ing perfect
I couldn't have quavered you couldn't have quavered she couldn't have quavered we couldn't have quavered you couldn't have quavered they couldn't have quavered	I couldn't have been quavering you couldn't have been quavering she couldn't have been quavering we couldn't have been quavering you couldn't have been quavering they couldn't have been quavering

Interrogative form

Simple form	V-ing form
could I quaver? could you quaver? could she quaver? could we quaver? could you quaver? could they quaver?	could I be quavering? could you be quavering? could she be quavering? could we be quavering? could you be quavering? could they be quavering?
Perfect	V-ing perfect
could I have quavered? could you have quavered? could she have quavered? could we have quavered? could you have quavered? could they have quavered?	could I have been quavering? could you have been quavering? could she have been quavering? could we have been quavering? could you have been quavering? could they have been quavering?

Interro-negative form

Simple form	V-ing form
couldn't I quaver? couldn't you quaver? couldn't she quaver? couldn't we quaver? couldn't you quaver? couldn't they quaver?	couldn't I be quavering? couldn't you be quavering? couldn't she be quavering? couldn't we be quavering? couldn't you be quavering? couldn't they be quavering?
Perfect	V-ing perfect
couldn't I have quavered? couldn't you have quavered? couldn't she have quavered? couldn't we have quavered? couldn't you have quavered? couldn't they have quavered?	couldn't I have been quavering? couldn't you have been quavering? couldn't she have been quavering? couldn't we have been quavering? couldn't you have been quavering? couldn't they have been quavering?