English verb conjugation
MUST QUAVER

Regular verb: quaver - quavered - quavered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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