I must follow you must follow he must follow we must follow you must follow they must follow
Forma com V-ing
I must be following you must be following he must be following we must be following you must be following they must be following
Perfeito
I must have followed you must have followed he must have followed we must have followed you must have followed they must have followed
Perfeito com V-ing
I must have been following you must have been following he must have been following we must have been following you must have been following they must have been following
Negação
Forma simple
I mustn't follow you mustn't follow he mustn't follow we mustn't follow you mustn't follow they mustn't follow
Forma com V-ing
I mustn't be following you mustn't be following he mustn't be following we mustn't be following you mustn't be following they mustn't be following
Perfeito
I mustn't have followed you mustn't have followed he mustn't have followed we mustn't have followed you mustn't have followed they mustn't have followed
Perfeito com V-ing
I mustn't have been following you mustn't have been following he mustn't have been following we mustn't have been following you mustn't have been following they mustn't have been following
Forma interrogativa
Forma simple
must I follow? must you follow? must he follow? must we follow? must you follow? must they follow?
Forma com V-ing
must I be following? must you be following? must he be following? must we be following? must you be following? must they be following?
Perfeito
must I have followed? must you have followed? must he have followed? must we have followed? must you have followed? must they have followed?
Perfeito com V-ing
must I have been following? must you have been following? must he have been following? must we have been following? must you have been following? must they have been following?
Forma interro-Negação
Forma simple
mustn't I follow? mustn't you follow? mustn't he follow? mustn't we follow? mustn't you follow? mustn't they follow?
Forma com V-ing
mustn't I be following? mustn't you be following? mustn't he be following? mustn't we be following? mustn't you be following? mustn't they be following?
Perfeito
mustn't I have followed? mustn't you have followed? mustn't he have followed? mustn't we have followed? mustn't you have followed? mustn't they have followed?
Perfeito com V-ing
mustn't I have been following? mustn't you have been following? mustn't he have been following? mustn't we have been following? mustn't you have been following? mustn't they have been following?