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 must not quaver you must not quaver he must not quaver we must not quaver you must not quaver they must not quaver	I must not be quavering you must not be quavering he must not be quavering we must not be quavering you must not be quavering they must not be quavering
Perfect	V-ing perfect
I must not have quavered you must not have quavered he must not have quavered we must not have quavered you must not have quavered they must not have quavered	I must not have been quavering you must not have been quavering he must not have been quavering we must not have been quavering you must not have been quavering they must not 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
must I not quaver? must you not quaver? must he not quaver? must we not quaver? must you not quaver? must they not quaver?	must I not be quavering? must you not be quavering? must he not be quavering? must we not be quavering? must you not be quavering? must they not be quavering?
Perfect	V-ing perfect
must I not have quavered? must you not have quavered? must he not have quavered? must we not have quavered? must you not have quavered? must they not have quavered?	must I not have been quavering? must you not have been quavering? must he not have been quavering? must we not have been quavering? must you not have been quavering? must they not have been quavering?