English verb conjugation
MUST AMUSE

Regular verb: amuse - amused - amused

Affirmation

Simple form	V-ing form
I must amuse you must amuse he must amuse we must amuse you must amuse they must amuse	I must be amusing you must be amusing he must be amusing we must be amusing you must be amusing they must be amusing
Perfect	V-ing perfect
I must have amused you must have amused he must have amused we must have amused you must have amused they must have amused	I must have been amusing you must have been amusing he must have been amusing we must have been amusing you must have been amusing they must have been amusing

Negation

Simple form	V-ing form
I mustn't amuse you mustn't amuse he mustn't amuse we mustn't amuse you mustn't amuse they mustn't amuse	I mustn't be amusing you mustn't be amusing he mustn't be amusing we mustn't be amusing you mustn't be amusing they mustn't be amusing
Perfect	V-ing perfect
I mustn't have amused you mustn't have amused he mustn't have amused we mustn't have amused you mustn't have amused they mustn't have amused	I mustn't have been amusing you mustn't have been amusing he mustn't have been amusing we mustn't have been amusing you mustn't have been amusing they mustn't have been amusing

Interrogative form

Simple form	V-ing form
must I amuse? must you amuse? must he amuse? must we amuse? must you amuse? must they amuse?	must I be amusing? must you be amusing? must he be amusing? must we be amusing? must you be amusing? must they be amusing?
Perfect	V-ing perfect
must I have amused? must you have amused? must he have amused? must we have amused? must you have amused? must they have amused?	must I have been amusing? must you have been amusing? must he have been amusing? must we have been amusing? must you have been amusing? must they have been amusing?

Interro-negative form

Simple form	V-ing form
mustn't I amuse? mustn't you amuse? mustn't he amuse? mustn't we amuse? mustn't you amuse? mustn't they amuse?	mustn't I be amusing? mustn't you be amusing? mustn't he be amusing? mustn't we be amusing? mustn't you be amusing? mustn't they be amusing?
Perfect	V-ing perfect
mustn't I have amused? mustn't you have amused? mustn't he have amused? mustn't we have amused? mustn't you have amused? mustn't they have amused?	mustn't I have been amusing? mustn't you have been amusing? mustn't he have been amusing? mustn't we have been amusing? mustn't you have been amusing? mustn't they have been amusing?