I must conjugate you must conjugate he must conjugate we must conjugate you must conjugate they must conjugate
V-ing form
I must be conjugating you must be conjugating he must be conjugating we must be conjugating you must be conjugating they must be conjugating
Perfect
I must have conjugated you must have conjugated he must have conjugated we must have conjugated you must have conjugated they must have conjugated
V-ing perfect
I must have been conjugating you must have been conjugating he must have been conjugating we must have been conjugating you must have been conjugating they must have been conjugating
Negation
Simple form
I mustn't conjugate you mustn't conjugate he mustn't conjugate we mustn't conjugate you mustn't conjugate they mustn't conjugate
V-ing form
I mustn't be conjugating you mustn't be conjugating he mustn't be conjugating we mustn't be conjugating you mustn't be conjugating they mustn't be conjugating
Perfect
I mustn't have conjugated you mustn't have conjugated he mustn't have conjugated we mustn't have conjugated you mustn't have conjugated they mustn't have conjugated
V-ing perfect
I mustn't have been conjugating you mustn't have been conjugating he mustn't have been conjugating we mustn't have been conjugating you mustn't have been conjugating they mustn't have been conjugating
Interrogative form
Simple form
must I conjugate? must you conjugate? must he conjugate? must we conjugate? must you conjugate? must they conjugate?
V-ing form
must I be conjugating? must you be conjugating? must he be conjugating? must we be conjugating? must you be conjugating? must they be conjugating?
Perfect
must I have conjugated? must you have conjugated? must he have conjugated? must we have conjugated? must you have conjugated? must they have conjugated?
V-ing perfect
must I have been conjugating? must you have been conjugating? must he have been conjugating? must we have been conjugating? must you have been conjugating? must they have been conjugating?
Interro-negative form
Simple form
mustn't I conjugate? mustn't you conjugate? mustn't he conjugate? mustn't we conjugate? mustn't you conjugate? mustn't they conjugate?
V-ing form
mustn't I be conjugating? mustn't you be conjugating? mustn't he be conjugating? mustn't we be conjugating? mustn't you be conjugating? mustn't they be conjugating?
Perfect
mustn't I have conjugated? mustn't you have conjugated? mustn't he have conjugated? mustn't we have conjugated? mustn't you have conjugated? mustn't they have conjugated?
V-ing perfect
mustn't I have been conjugating? mustn't you have been conjugating? mustn't he have been conjugating? mustn't we have been conjugating? mustn't you have been conjugating? mustn't they have been conjugating?