English verb conjugation
MUST GRATE

Regular verb: grate - grated - grated

Affirmation

Simple form	V-ing form
I must grate you must grate she must grate we must grate you must grate they must grate	I must be grating you must be grating she must be grating we must be grating you must be grating they must be grating
Perfect	V-ing perfect
I must have grated you must have grated she must have grated we must have grated you must have grated they must have grated	I must have been grating you must have been grating she must have been grating we must have been grating you must have been grating they must have been grating

Negation

Simple form	V-ing form
I mustn't grate you mustn't grate she mustn't grate we mustn't grate you mustn't grate they mustn't grate	I mustn't be grating you mustn't be grating she mustn't be grating we mustn't be grating you mustn't be grating they mustn't be grating
Perfect	V-ing perfect
I mustn't have grated you mustn't have grated she mustn't have grated we mustn't have grated you mustn't have grated they mustn't have grated	I mustn't have been grating you mustn't have been grating she mustn't have been grating we mustn't have been grating you mustn't have been grating they mustn't have been grating

Interrogative form

Simple form	V-ing form
must I grate? must you grate? must she grate? must we grate? must you grate? must they grate?	must I be grating? must you be grating? must she be grating? must we be grating? must you be grating? must they be grating?
Perfect	V-ing perfect
must I have grated? must you have grated? must she have grated? must we have grated? must you have grated? must they have grated?	must I have been grating? must you have been grating? must she have been grating? must we have been grating? must you have been grating? must they have been grating?

Interro-negative form

Simple form	V-ing form
mustn't I grate? mustn't you grate? mustn't she grate? mustn't we grate? mustn't you grate? mustn't they grate?	mustn't I be grating? mustn't you be grating? mustn't she be grating? mustn't we be grating? mustn't you be grating? mustn't they be grating?
Perfect	V-ing perfect
mustn't I have grated? mustn't you have grated? mustn't she have grated? mustn't we have grated? mustn't you have grated? mustn't they have grated?	mustn't I have been grating? mustn't you have been grating? mustn't she have been grating? mustn't we have been grating? mustn't you have been grating? mustn't they have been grating?