I must try you must try he must try we must try you must try they must try
Forma com V-ing
I must be trying you must be trying he must be trying we must be trying you must be trying they must be trying
Perfeito
I must have tried you must have tried he must have tried we must have tried you must have tried they must have tried
Perfeito com V-ing
I must have been trying you must have been trying he must have been trying we must have been trying you must have been trying they must have been trying
Negação
Forma simple
I mustn't try you mustn't try he mustn't try we mustn't try you mustn't try they mustn't try
Forma com V-ing
I mustn't be trying you mustn't be trying he mustn't be trying we mustn't be trying you mustn't be trying they mustn't be trying
Perfeito
I mustn't have tried you mustn't have tried he mustn't have tried we mustn't have tried you mustn't have tried they mustn't have tried
Perfeito com V-ing
I mustn't have been trying you mustn't have been trying he mustn't have been trying we mustn't have been trying you mustn't have been trying they mustn't have been trying
Forma interrogativa
Forma simple
must I try? must you try? must he try? must we try? must you try? must they try?
Forma com V-ing
must I be trying? must you be trying? must he be trying? must we be trying? must you be trying? must they be trying?
Perfeito
must I have tried? must you have tried? must he have tried? must we have tried? must you have tried? must they have tried?
Perfeito com V-ing
must I have been trying? must you have been trying? must he have been trying? must we have been trying? must you have been trying? must they have been trying?
Forma interro-Negação
Forma simple
mustn't I try? mustn't you try? mustn't he try? mustn't we try? mustn't you try? mustn't they try?
Forma com V-ing
mustn't I be trying? mustn't you be trying? mustn't he be trying? mustn't we be trying? mustn't you be trying? mustn't they be trying?
Perfeito
mustn't I have tried? mustn't you have tried? mustn't he have tried? mustn't we have tried? mustn't you have tried? mustn't they have tried?
Perfeito com V-ing
mustn't I have been trying? mustn't you have been trying? mustn't he have been trying? mustn't we have been trying? mustn't you have been trying? mustn't they have been trying?