English verb conjugation
MUST SEAT

Regular verb: seat - seated - seated

Affirmation

Simple form	V-ing form
I must seat you must seat he must seat we must seat you must seat they must seat	I must be seating you must be seating he must be seating we must be seating you must be seating they must be seating
Perfect	V-ing perfect
I must have seated you must have seated he must have seated we must have seated you must have seated they must have seated	I must have been seating you must have been seating he must have been seating we must have been seating you must have been seating they must have been seating

Negation

Simple form	V-ing form
I mustn't seat you mustn't seat he mustn't seat we mustn't seat you mustn't seat they mustn't seat	I mustn't be seating you mustn't be seating he mustn't be seating we mustn't be seating you mustn't be seating they mustn't be seating
Perfect	V-ing perfect
I mustn't have seated you mustn't have seated he mustn't have seated we mustn't have seated you mustn't have seated they mustn't have seated	I mustn't have been seating you mustn't have been seating he mustn't have been seating we mustn't have been seating you mustn't have been seating they mustn't have been seating

Interrogative form

Simple form	V-ing form
must I seat? must you seat? must he seat? must we seat? must you seat? must they seat?	must I be seating? must you be seating? must he be seating? must we be seating? must you be seating? must they be seating?
Perfect	V-ing perfect
must I have seated? must you have seated? must he have seated? must we have seated? must you have seated? must they have seated?	must I have been seating? must you have been seating? must he have been seating? must we have been seating? must you have been seating? must they have been seating?

Interro-negative form

Simple form	V-ing form
mustn't I seat? mustn't you seat? mustn't he seat? mustn't we seat? mustn't you seat? mustn't they seat?	mustn't I be seating? mustn't you be seating? mustn't he be seating? mustn't we be seating? mustn't you be seating? mustn't they be seating?
Perfect	V-ing perfect
mustn't I have seated? mustn't you have seated? mustn't he have seated? mustn't we have seated? mustn't you have seated? mustn't they have seated?	mustn't I have been seating? mustn't you have been seating? mustn't he have been seating? mustn't we have been seating? mustn't you have been seating? mustn't they have been seating?