must register
Verbo regolare: register - registered- registered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must register
you must register
she must register
we must register
you must register
they must register 	I must be registering
you must be registering
she must be registering
we must be registering
you must be registering
they must be registering	I must have registered
you must have registered
she must have registered
we must have registered
you must have registered
they must have registered	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	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not register
you must not register
she must not register
we must not register
you must not register
they must not register 	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	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	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 semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I register?
must you register?
must she register?
must we register?
must you register?
must they register? 	must I be registering?
must you be registering?
must she be registering?
must we be registering?
must you be registering?
must they be registering? 	must I have registered?
must you have registered?
must she have registered?
must we have registered?
must you have registered?
must they have registered? 	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-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not register?
must you not register?
must she not register?
must we not register?
must you not register?
must they not register? 	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? 	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? 	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?