must lesson
Verbo regolare: lesson - lessoned- lessoned

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must lesson
you must lesson
she must lesson
we must lesson
you must lesson
they must lesson 	I must be lessoning
you must be lessoning
she must be lessoning
we must be lessoning
you must be lessoning
they must be lessoning	I must have lessoned
you must have lessoned
she must have lessoned
we must have lessoned
you must have lessoned
they must have lessoned	I must have been lessoning
you must have been lessoning
she must have been lessoning
we must have been lessoning
you must have been lessoning
they must have been lessoning	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not lesson
you must not lesson
she must not lesson
we must not lesson
you must not lesson
they must not lesson 	I must not be lessoning
you must not be lessoning
she must not be lessoning
we must not be lessoning
you must not be lessoning
they must not be lessoning	I must not have lessoned
you must not have lessoned
she must not have lessoned
we must not have lessoned
you must not have lessoned
they must not have lessoned	I must not have been lessoning
you must not have been lessoning
she must not have been lessoning
we must not have been lessoning
you must not have been lessoning
they must not have been lessoning	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I lesson?
must you lesson?
must she lesson?
must we lesson?
must you lesson?
must they lesson? 	must I be lessoning?
must you be lessoning?
must she be lessoning?
must we be lessoning?
must you be lessoning?
must they be lessoning? 	must I have lessoned?
must you have lessoned?
must she have lessoned?
must we have lessoned?
must you have lessoned?
must they have lessoned? 	must I have been lessoning?
must you have been lessoning?
must she have been lessoning?
must we have been lessoning?
must you have been lessoning?
must they have been lessoning? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not lesson?
must you not lesson?
must she not lesson?
must we not lesson?
must you not lesson?
must they not lesson? 	must I not be lessoning?
must you not be lessoning?
must she not be lessoning?
must we not be lessoning?
must you not be lessoning?
must they not be lessoning? 	must I not have lessoned?
must you not have lessoned?
must she not have lessoned?
must we not have lessoned?
must you not have lessoned?
must they not have lessoned? 	must I not have been lessoning?
must you not have been lessoning?
must she not have been lessoning?
must we not have been lessoning?
must you not have been lessoning?
must they not have been lessoning?