must clean
Verbo regolare: clean - cleaned- cleaned

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must clean
you must clean
he must clean
we must clean
you must clean
they must clean 	I must be cleaning
you must be cleaning
he must be cleaning
we must be cleaning
you must be cleaning
they must be cleaning	I must have cleaned
you must have cleaned
he must have cleaned
we must have cleaned
you must have cleaned
they must have cleaned	I must have been cleaning
you must have been cleaning
he must have been cleaning
we must have been cleaning
you must have been cleaning
they must have been cleaning	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not clean
you must not clean
he must not clean
we must not clean
you must not clean
they must not clean 	I must not be cleaning
you must not be cleaning
he must not be cleaning
we must not be cleaning
you must not be cleaning
they must not be cleaning	I must not have cleaned
you must not have cleaned
he must not have cleaned
we must not have cleaned
you must not have cleaned
they must not have cleaned	I must not have been cleaning
you must not have been cleaning
he must not have been cleaning
we must not have been cleaning
you must not have been cleaning
they must not have been cleaning	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I clean?
must you clean?
must he clean?
must we clean?
must you clean?
must they clean? 	must I be cleaning?
must you be cleaning?
must he be cleaning?
must we be cleaning?
must you be cleaning?
must they be cleaning? 	must I have cleaned?
must you have cleaned?
must he have cleaned?
must we have cleaned?
must you have cleaned?
must they have cleaned? 	must I have been cleaning?
must you have been cleaning?
must he have been cleaning?
must we have been cleaning?
must you have been cleaning?
must they have been cleaning? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not clean?
must you not clean?
must he not clean?
must we not clean?
must you not clean?
must they not clean? 	must I not be cleaning?
must you not be cleaning?
must he not be cleaning?
must we not be cleaning?
must you not be cleaning?
must they not be cleaning? 	must I not have cleaned?
must you not have cleaned?
must he not have cleaned?
must we not have cleaned?
must you not have cleaned?
must they not have cleaned? 	must I not have been cleaning?
must you not have been cleaning?
must he not have been cleaning?
must we not have been cleaning?
must you not have been cleaning?
must they not have been cleaning?