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 mustn't read you mustn't read he mustn't read we mustn't read you mustn't read they mustn't read	I mustn't be reading you mustn't be reading he mustn't be reading we mustn't be reading you mustn't be reading they mustn't be reading
Perfect	V-ing perfect
I mustn't have read you mustn't have read he mustn't have read we mustn't have read you mustn't have read they mustn't have read	I mustn't have been reading you mustn't have been reading he mustn't have been reading we mustn't have been reading you mustn't have been reading they mustn't 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
mustn't I read? mustn't you read? mustn't he read? mustn't we read? mustn't you read? mustn't they read?	mustn't I be reading? mustn't you be reading? mustn't he be reading? mustn't we be reading? mustn't you be reading? mustn't they be reading?
Perfect	V-ing perfect
mustn't I have read? mustn't you have read? mustn't he have read? mustn't we have read? mustn't you have read? mustn't they have read?	mustn't I have been reading? mustn't you have been reading? mustn't he have been reading? mustn't we have been reading? mustn't you have been reading? mustn't they have been reading?