English verb conjugation
MUST LESSON

Regular verb: lesson - lessoned - lessoned

Affirmation

Simple form	V-ing form
I must lesson you must lesson he must lesson we must lesson you must lesson they must lesson	I must be lessoning you must be lessoning he must be lessoning we must be lessoning you must be lessoning they must be lessoning
Perfect	V-ing perfect
I must have lessoned you must have lessoned he 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 he must have been lessoning we must have been lessoning you must have been lessoning they must have been lessoning

Negation

Simple form	V-ing form
I must not lesson you must not lesson he 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 he must not be lessoning we must not be lessoning you must not be lessoning they must not be lessoning
Perfect	V-ing perfect
I must not have lessoned you must not have lessoned he 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 he must not have been lessoning we must not have been lessoning you must not have been lessoning they must not have been lessoning

Interrogative form

Simple form	V-ing form
must I lesson? must you lesson? must he lesson? must we lesson? must you lesson? must they lesson?	must I be lessoning? must you be lessoning? must he be lessoning? must we be lessoning? must you be lessoning? must they be lessoning?
Perfect	V-ing perfect
must I have lessoned? must you have lessoned? must he 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 he have been lessoning? must we have been lessoning? must you have been lessoning? must they have been lessoning?

Interro-negative form

Simple form	V-ing form
must I not lesson? must you not lesson? must he 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 he not be lessoning? must we not be lessoning? must you not be lessoning? must they not be lessoning?
Perfect	V-ing perfect
must I not have lessoned? must you not have lessoned? must he 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 he not have been lessoning? must we not have been lessoning? must you not have been lessoning? must they not have been lessoning?