must knock
Verbo regolare: knock - knocked- knocked

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must knock
you must knock
he must knock
we must knock
you must knock
they must knock 	I must be knocking
you must be knocking
he must be knocking
we must be knocking
you must be knocking
they must be knocking	I must have knocked
you must have knocked
he must have knocked
we must have knocked
you must have knocked
they must have knocked	I must have been knocking
you must have been knocking
he must have been knocking
we must have been knocking
you must have been knocking
they must have been knocking	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not knock
you must not knock
he must not knock
we must not knock
you must not knock
they must not knock 	I must not be knocking
you must not be knocking
he must not be knocking
we must not be knocking
you must not be knocking
they must not be knocking	I must not have knocked
you must not have knocked
he must not have knocked
we must not have knocked
you must not have knocked
they must not have knocked	I must not have been knocking
you must not have been knocking
he must not have been knocking
we must not have been knocking
you must not have been knocking
they must not have been knocking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I knock?
must you knock?
must he knock?
must we knock?
must you knock?
must they knock? 	must I be knocking?
must you be knocking?
must he be knocking?
must we be knocking?
must you be knocking?
must they be knocking? 	must I have knocked?
must you have knocked?
must he have knocked?
must we have knocked?
must you have knocked?
must they have knocked? 	must I have been knocking?
must you have been knocking?
must he have been knocking?
must we have been knocking?
must you have been knocking?
must they have been knocking? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not knock?
must you not knock?
must he not knock?
must we not knock?
must you not knock?
must they not knock? 	must I not be knocking?
must you not be knocking?
must he not be knocking?
must we not be knocking?
must you not be knocking?
must they not be knocking? 	must I not have knocked?
must you not have knocked?
must he not have knocked?
must we not have knocked?
must you not have knocked?
must they not have knocked? 	must I not have been knocking?
must you not have been knocking?
must he not have been knocking?
must we not have been knocking?
must you not have been knocking?
must they not have been knocking?