I must grieve you must grieve he must grieve we must grieve you must grieve they must grieve
Forma con V-ing
I must be grieving you must be grieving he must be grieving we must be grieving you must be grieving they must be grieving
Perfecto
I must have grieved you must have grieved he must have grieved we must have grieved you must have grieved they must have grieved
Perfecto con V-ing
I must have been grieving you must have been grieving he must have been grieving we must have been grieving you must have been grieving they must have been grieving
Negación
Forma simple
I mustn't grieve you mustn't grieve he mustn't grieve we mustn't grieve you mustn't grieve they mustn't grieve
Forma con V-ing
I mustn't be grieving you mustn't be grieving he mustn't be grieving we mustn't be grieving you mustn't be grieving they mustn't be grieving
Perfecto
I mustn't have grieved you mustn't have grieved he mustn't have grieved we mustn't have grieved you mustn't have grieved they mustn't have grieved
Perfecto con V-ing
I mustn't have been grieving you mustn't have been grieving he mustn't have been grieving we mustn't have been grieving you mustn't have been grieving they mustn't have been grieving
Forma interrogativa
Forma simple
must I grieve? must you grieve? must he grieve? must we grieve? must you grieve? must they grieve?
Forma con V-ing
must I be grieving? must you be grieving? must he be grieving? must we be grieving? must you be grieving? must they be grieving?
Perfecto
must I have grieved? must you have grieved? must he have grieved? must we have grieved? must you have grieved? must they have grieved?
Perfecto con V-ing
must I have been grieving? must you have been grieving? must he have been grieving? must we have been grieving? must you have been grieving? must they have been grieving?
Forma interro-negativa
Forma simple
mustn't I grieve? mustn't you grieve? mustn't he grieve? mustn't we grieve? mustn't you grieve? mustn't they grieve?
Forma con V-ing
mustn't I be grieving? mustn't you be grieving? mustn't he be grieving? mustn't we be grieving? mustn't you be grieving? mustn't they be grieving?
Perfecto
mustn't I have grieved? mustn't you have grieved? mustn't he have grieved? mustn't we have grieved? mustn't you have grieved? mustn't they have grieved?
Perfecto con V-ing
mustn't I have been grieving? mustn't you have been grieving? mustn't he have been grieving? mustn't we have been grieving? mustn't you have been grieving? mustn't they have been grieving?