I must switch you must switch she must switch we must switch you must switch they must switch
Forma com V-ing
I must be switching you must be switching she must be switching we must be switching you must be switching they must be switching
Perfeito
I must have switched you must have switched she must have switched we must have switched you must have switched they must have switched
Perfeito com V-ing
I must have been switching you must have been switching she must have been switching we must have been switching you must have been switching they must have been switching
Negação
Forma simple
I must not switch you must not switch she must not switch we must not switch you must not switch they must not switch
Forma com V-ing
I must not be switching you must not be switching she must not be switching we must not be switching you must not be switching they must not be switching
Perfeito
I must not have switched you must not have switched she must not have switched we must not have switched you must not have switched they must not have switched
Perfeito com V-ing
I must not have been switching you must not have been switching she must not have been switching we must not have been switching you must not have been switching they must not have been switching
Forma interrogativa
Forma simple
must I switch? must you switch? must she switch? must we switch? must you switch? must they switch?
Forma com V-ing
must I be switching? must you be switching? must she be switching? must we be switching? must you be switching? must they be switching?
Perfeito
must I have switched? must you have switched? must she have switched? must we have switched? must you have switched? must they have switched?
Perfeito com V-ing
must I have been switching? must you have been switching? must she have been switching? must we have been switching? must you have been switching? must they have been switching?
Forma interro-Negação
Forma simple
must I not switch? must you not switch? must she not switch? must we not switch? must you not switch? must they not switch?
Forma com V-ing
must I not be switching? must you not be switching? must she not be switching? must we not be switching? must you not be switching? must they not be switching?
Perfeito
must I not have switched? must you not have switched? must she not have switched? must we not have switched? must you not have switched? must they not have switched?
Perfeito com V-ing
must I not have been switching? must you not have been switching? must she not have been switching? must we not have been switching? must you not have been switching? must they not have been switching?