English verb conjugation
MUST READ

Irregular verb: read - read - read

Affirmation

Simple form	V-ing form
I must read you must read he must read we must read you must read they must read	I must be reading you must be reading he must be reading we must be reading you must be reading they must be reading
Perfect	V-ing perfect
I must have read you must have read he must have read we must have read you must have read they must have read	I must have been reading you must have been reading he must have been reading we must have been reading you must have been reading they must have been reading

Negation

Simple form	V-ing form
I must not read you must not read he must not read we must not read you must not read they must not read	I must not be reading you must not be reading he must not be reading we must not be reading you must not be reading they must not be reading
Perfect	V-ing perfect
I must not have read you must not have read he must not have read we must not have read you must not have read they must not have read	I must not have been reading you must not have been reading he must not have been reading we must not have been reading you must not have been reading they must not have been reading

Interrogative form

Simple form	V-ing form
must I read? must you read? must he read? must we read? must you read? must they read?	must I be reading? must you be reading? must he be reading? must we be reading? must you be reading? must they be reading?
Perfect	V-ing perfect
must I have read? must you have read? must he have read? must we have read? must you have read? must they have read?	must I have been reading? must you have been reading? must he have been reading? must we have been reading? must you have been reading? must they have been reading?

Interro-negative form

Simple form	V-ing form
must I not read? must you not read? must he not read? must we not read? must you not read? must they not read?	must I not be reading? must you not be reading? must he not be reading? must we not be reading? must you not be reading? must they not be reading?
Perfect	V-ing perfect
must I not have read? must you not have read? must he not have read? must we not have read? must you not have read? must they not have read?	must I not have been reading? must you not have been reading? must he not have been reading? must we not have been reading? must you not have been reading? must they not have been reading?