I must register you must register she must register we must register you must register they must register
Forma com V-ing
I must be registering you must be registering she must be registering we must be registering you must be registering they must be registering
Perfeito
I must have registered you must have registered she must have registered we must have registered you must have registered they must have registered
Perfeito com V-ing
I must have been registering you must have been registering she must have been registering we must have been registering you must have been registering they must have been registering
Negação
Forma simple
I must not register you must not register she must not register we must not register you must not register they must not register
Forma com V-ing
I must not be registering you must not be registering she must not be registering we must not be registering you must not be registering they must not be registering
Perfeito
I must not have registered you must not have registered she must not have registered we must not have registered you must not have registered they must not have registered
Perfeito com V-ing
I must not have been registering you must not have been registering she must not have been registering we must not have been registering you must not have been registering they must not have been registering
Forma interrogativa
Forma simple
must I register? must you register? must she register? must we register? must you register? must they register?
Forma com V-ing
must I be registering? must you be registering? must she be registering? must we be registering? must you be registering? must they be registering?
Perfeito
must I have registered? must you have registered? must she have registered? must we have registered? must you have registered? must they have registered?
Perfeito com V-ing
must I have been registering? must you have been registering? must she have been registering? must we have been registering? must you have been registering? must they have been registering?
Forma interro-Negação
Forma simple
must I not register? must you not register? must she not register? must we not register? must you not register? must they not register?
Forma com V-ing
must I not be registering? must you not be registering? must she not be registering? must we not be registering? must you not be registering? must they not be registering?
Perfeito
must I not have registered? must you not have registered? must she not have registered? must we not have registered? must you not have registered? must they not have registered?
Perfeito com V-ing
must I not have been registering? must you not have been registering? must she not have been registering? must we not have been registering? must you not have been registering? must they not have been registering?