I must writhe you must writhe he must writhe we must writhe you must writhe they must writhe
Forma con V-ing
I must be writhing you must be writhing he must be writhing we must be writhing you must be writhing they must be writhing
Perfecto
I must have writhed you must have writhed he must have writhed we must have writhed you must have writhed they must have writhed
Perfecto con V-ing
I must have been writhing you must have been writhing he must have been writhing we must have been writhing you must have been writhing they must have been writhing
Negación
Forma simple
I must not writhe you must not writhe he must not writhe we must not writhe you must not writhe they must not writhe
Forma con V-ing
I must not be writhing you must not be writhing he must not be writhing we must not be writhing you must not be writhing they must not be writhing
Perfecto
I must not have writhed you must not have writhed he must not have writhed we must not have writhed you must not have writhed they must not have writhed
Perfecto con V-ing
I must not have been writhing you must not have been writhing he must not have been writhing we must not have been writhing you must not have been writhing they must not have been writhing
Forma interrogativa
Forma simple
must I writhe? must you writhe? must he writhe? must we writhe? must you writhe? must they writhe?
Forma con V-ing
must I be writhing? must you be writhing? must he be writhing? must we be writhing? must you be writhing? must they be writhing?
Perfecto
must I have writhed? must you have writhed? must he have writhed? must we have writhed? must you have writhed? must they have writhed?
Perfecto con V-ing
must I have been writhing? must you have been writhing? must he have been writhing? must we have been writhing? must you have been writhing? must they have been writhing?
Forma interro-negativa
Forma simple
must I not writhe? must you not writhe? must he not writhe? must we not writhe? must you not writhe? must they not writhe?
Forma con V-ing
must I not be writhing? must you not be writhing? must he not be writhing? must we not be writhing? must you not be writhing? must they not be writhing?
Perfecto
must I not have writhed? must you not have writhed? must he not have writhed? must we not have writhed? must you not have writhed? must they not have writhed?
Perfecto con V-ing
must I not have been writhing? must you not have been writhing? must he not have been writhing? must we not have been writhing? must you not have been writhing? must they not have been writhing?