I must fever you must fever she must fever we must fever you must fever they must fever
Forma con V-ing
I must be fevering you must be fevering she must be fevering we must be fevering you must be fevering they must be fevering
Perfecto
I must have fevered you must have fevered she must have fevered we must have fevered you must have fevered they must have fevered
Perfecto con V-ing
I must have been fevering you must have been fevering she must have been fevering we must have been fevering you must have been fevering they must have been fevering
Negación
Forma simple
I must not fever you must not fever she must not fever we must not fever you must not fever they must not fever
Forma con V-ing
I must not be fevering you must not be fevering she must not be fevering we must not be fevering you must not be fevering they must not be fevering
Perfecto
I must not have fevered you must not have fevered she must not have fevered we must not have fevered you must not have fevered they must not have fevered
Perfecto con V-ing
I must not have been fevering you must not have been fevering she must not have been fevering we must not have been fevering you must not have been fevering they must not have been fevering
Forma interrogativa
Forma simple
must I fever? must you fever? must she fever? must we fever? must you fever? must they fever?
Forma con V-ing
must I be fevering? must you be fevering? must she be fevering? must we be fevering? must you be fevering? must they be fevering?
Perfecto
must I have fevered? must you have fevered? must she have fevered? must we have fevered? must you have fevered? must they have fevered?
Perfecto con V-ing
must I have been fevering? must you have been fevering? must she have been fevering? must we have been fevering? must you have been fevering? must they have been fevering?
Forma interro-negativa
Forma simple
must I not fever? must you not fever? must she not fever? must we not fever? must you not fever? must they not fever?
Forma con V-ing
must I not be fevering? must you not be fevering? must she not be fevering? must we not be fevering? must you not be fevering? must they not be fevering?
Perfecto
must I not have fevered? must you not have fevered? must she not have fevered? must we not have fevered? must you not have fevered? must they not have fevered?
Perfecto con V-ing
must I not have been fevering? must you not have been fevering? must she not have been fevering? must we not have been fevering? must you not have been fevering? must they not have been fevering?