English verb conjugation
MUST SPURN

Regular verb: spurn - spurned - spurned

Affirmation

Simple form	V-ing form
I must spurn you must spurn he must spurn we must spurn you must spurn they must spurn	I must be spurning you must be spurning he must be spurning we must be spurning you must be spurning they must be spurning
Perfect	V-ing perfect
I must have spurned you must have spurned he must have spurned we must have spurned you must have spurned they must have spurned	I must have been spurning you must have been spurning he must have been spurning we must have been spurning you must have been spurning they must have been spurning

Negation

Simple form	V-ing form
I mustn't spurn you mustn't spurn he mustn't spurn we mustn't spurn you mustn't spurn they mustn't spurn	I mustn't be spurning you mustn't be spurning he mustn't be spurning we mustn't be spurning you mustn't be spurning they mustn't be spurning
Perfect	V-ing perfect
I mustn't have spurned you mustn't have spurned he mustn't have spurned we mustn't have spurned you mustn't have spurned they mustn't have spurned	I mustn't have been spurning you mustn't have been spurning he mustn't have been spurning we mustn't have been spurning you mustn't have been spurning they mustn't have been spurning

Interrogative form

Simple form	V-ing form
must I spurn? must you spurn? must he spurn? must we spurn? must you spurn? must they spurn?	must I be spurning? must you be spurning? must he be spurning? must we be spurning? must you be spurning? must they be spurning?
Perfect	V-ing perfect
must I have spurned? must you have spurned? must he have spurned? must we have spurned? must you have spurned? must they have spurned?	must I have been spurning? must you have been spurning? must he have been spurning? must we have been spurning? must you have been spurning? must they have been spurning?

Interro-negative form

Simple form	V-ing form
mustn't I spurn? mustn't you spurn? mustn't he spurn? mustn't we spurn? mustn't you spurn? mustn't they spurn?	mustn't I be spurning? mustn't you be spurning? mustn't he be spurning? mustn't we be spurning? mustn't you be spurning? mustn't they be spurning?
Perfect	V-ing perfect
mustn't I have spurned? mustn't you have spurned? mustn't he have spurned? mustn't we have spurned? mustn't you have spurned? mustn't they have spurned?	mustn't I have been spurning? mustn't you have been spurning? mustn't he have been spurning? mustn't we have been spurning? mustn't you have been spurning? mustn't they have been spurning?