I must boil you must boil she must boil we must boil you must boil they must boil
Forma com V-ing
I must be boiling you must be boiling she must be boiling we must be boiling you must be boiling they must be boiling
Perfeito
I must have boiled you must have boiled she must have boiled we must have boiled you must have boiled they must have boiled
Perfeito com V-ing
I must have been boiling you must have been boiling she must have been boiling we must have been boiling you must have been boiling they must have been boiling
Negação
Forma simple
I mustn't boil you mustn't boil she mustn't boil we mustn't boil you mustn't boil they mustn't boil
Forma com V-ing
I mustn't be boiling you mustn't be boiling she mustn't be boiling we mustn't be boiling you mustn't be boiling they mustn't be boiling
Perfeito
I mustn't have boiled you mustn't have boiled she mustn't have boiled we mustn't have boiled you mustn't have boiled they mustn't have boiled
Perfeito com V-ing
I mustn't have been boiling you mustn't have been boiling she mustn't have been boiling we mustn't have been boiling you mustn't have been boiling they mustn't have been boiling
Forma interrogativa
Forma simple
must I boil? must you boil? must she boil? must we boil? must you boil? must they boil?
Forma com V-ing
must I be boiling? must you be boiling? must she be boiling? must we be boiling? must you be boiling? must they be boiling?
Perfeito
must I have boiled? must you have boiled? must she have boiled? must we have boiled? must you have boiled? must they have boiled?
Perfeito com V-ing
must I have been boiling? must you have been boiling? must she have been boiling? must we have been boiling? must you have been boiling? must they have been boiling?
Forma interro-Negação
Forma simple
mustn't I boil? mustn't you boil? mustn't she boil? mustn't we boil? mustn't you boil? mustn't they boil?
Forma com V-ing
mustn't I be boiling? mustn't you be boiling? mustn't she be boiling? mustn't we be boiling? mustn't you be boiling? mustn't they be boiling?
Perfeito
mustn't I have boiled? mustn't you have boiled? mustn't she have boiled? mustn't we have boiled? mustn't you have boiled? mustn't they have boiled?
Perfeito com V-ing
mustn't I have been boiling? mustn't you have been boiling? mustn't she have been boiling? mustn't we have been boiling? mustn't you have been boiling? mustn't they have been boiling?