I must quiver you must quiver he must quiver we must quiver you must quiver they must quiver
Forma con V-ing
I must be quivering you must be quivering he must be quivering we must be quivering you must be quivering they must be quivering
Perfecto
I must have quivered you must have quivered he must have quivered we must have quivered you must have quivered they must have quivered
Perfecto con V-ing
I must have been quivering you must have been quivering he must have been quivering we must have been quivering you must have been quivering they must have been quivering
Negación
Forma simple
I must not quiver you must not quiver he must not quiver we must not quiver you must not quiver they must not quiver
Forma con V-ing
I must not be quivering you must not be quivering he must not be quivering we must not be quivering you must not be quivering they must not be quivering
Perfecto
I must not have quivered you must not have quivered he must not have quivered we must not have quivered you must not have quivered they must not have quivered
Perfecto con V-ing
I must not have been quivering you must not have been quivering he must not have been quivering we must not have been quivering you must not have been quivering they must not have been quivering
Forma interrogativa
Forma simple
must I quiver? must you quiver? must he quiver? must we quiver? must you quiver? must they quiver?
Forma con V-ing
must I be quivering? must you be quivering? must he be quivering? must we be quivering? must you be quivering? must they be quivering?
Perfecto
must I have quivered? must you have quivered? must he have quivered? must we have quivered? must you have quivered? must they have quivered?
Perfecto con V-ing
must I have been quivering? must you have been quivering? must he have been quivering? must we have been quivering? must you have been quivering? must they have been quivering?
Forma interro-negativa
Forma simple
must I not quiver? must you not quiver? must he not quiver? must we not quiver? must you not quiver? must they not quiver?
Forma con V-ing
must I not be quivering? must you not be quivering? must he not be quivering? must we not be quivering? must you not be quivering? must they not be quivering?
Perfecto
must I not have quivered? must you not have quivered? must he not have quivered? must we not have quivered? must you not have quivered? must they not have quivered?
Perfecto con V-ing
must I not have been quivering? must you not have been quivering? must he not have been quivering? must we not have been quivering? must you not have been quivering? must they not have been quivering?