I must follow you must follow she must follow we must follow you must follow they must follow
Forma con V-ing
I must be following you must be following she must be following we must be following you must be following they must be following
Perfecto
I must have followed you must have followed she must have followed we must have followed you must have followed they must have followed
Perfecto con V-ing
I must have been following you must have been following she must have been following we must have been following you must have been following they must have been following
Negación
Forma simple
I must not follow you must not follow she must not follow we must not follow you must not follow they must not follow
Forma con V-ing
I must not be following you must not be following she must not be following we must not be following you must not be following they must not be following
Perfecto
I must not have followed you must not have followed she must not have followed we must not have followed you must not have followed they must not have followed
Perfecto con V-ing
I must not have been following you must not have been following she must not have been following we must not have been following you must not have been following they must not have been following
Forma interrogativa
Forma simple
must I follow? must you follow? must she follow? must we follow? must you follow? must they follow?
Forma con V-ing
must I be following? must you be following? must she be following? must we be following? must you be following? must they be following?
Perfecto
must I have followed? must you have followed? must she have followed? must we have followed? must you have followed? must they have followed?
Perfecto con V-ing
must I have been following? must you have been following? must she have been following? must we have been following? must you have been following? must they have been following?
Forma interro-negativa
Forma simple
must I not follow? must you not follow? must she not follow? must we not follow? must you not follow? must they not follow?
Forma con V-ing
must I not be following? must you not be following? must she not be following? must we not be following? must you not be following? must they not be following?
Perfecto
must I not have followed? must you not have followed? must she not have followed? must we not have followed? must you not have followed? must they not have followed?
Perfecto con V-ing
must I not have been following? must you not have been following? must she not have been following? must we not have been following? must you not have been following? must they not have been following?