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