English verb conjugation
MUST OVERTURN

Regular verb: overturn - overturned - overturned

Affirmation

Simple form	V-ing form
I must overturn you must overturn he must overturn we must overturn you must overturn they must overturn	I must be overturning you must be overturning he must be overturning we must be overturning you must be overturning they must be overturning
Perfect	V-ing perfect
I must have overturned you must have overturned he must have overturned we must have overturned you must have overturned they must have overturned	I must have been overturning you must have been overturning he must have been overturning we must have been overturning you must have been overturning they must have been overturning

Negation

Simple form	V-ing form
I mustn't overturn you mustn't overturn he mustn't overturn we mustn't overturn you mustn't overturn they mustn't overturn	I mustn't be overturning you mustn't be overturning he mustn't be overturning we mustn't be overturning you mustn't be overturning they mustn't be overturning
Perfect	V-ing perfect
I mustn't have overturned you mustn't have overturned he mustn't have overturned we mustn't have overturned you mustn't have overturned they mustn't have overturned	I mustn't have been overturning you mustn't have been overturning he mustn't have been overturning we mustn't have been overturning you mustn't have been overturning they mustn't have been overturning

Interrogative form

Simple form	V-ing form
must I overturn? must you overturn? must he overturn? must we overturn? must you overturn? must they overturn?	must I be overturning? must you be overturning? must he be overturning? must we be overturning? must you be overturning? must they be overturning?
Perfect	V-ing perfect
must I have overturned? must you have overturned? must he have overturned? must we have overturned? must you have overturned? must they have overturned?	must I have been overturning? must you have been overturning? must he have been overturning? must we have been overturning? must you have been overturning? must they have been overturning?

Interro-negative form

Simple form	V-ing form
mustn't I overturn? mustn't you overturn? mustn't he overturn? mustn't we overturn? mustn't you overturn? mustn't they overturn?	mustn't I be overturning? mustn't you be overturning? mustn't he be overturning? mustn't we be overturning? mustn't you be overturning? mustn't they be overturning?
Perfect	V-ing perfect
mustn't I have overturned? mustn't you have overturned? mustn't he have overturned? mustn't we have overturned? mustn't you have overturned? mustn't they have overturned?	mustn't I have been overturning? mustn't you have been overturning? mustn't he have been overturning? mustn't we have been overturning? mustn't you have been overturning? mustn't they have been overturning?