I must spurn you must spurn he must spurn we must spurn you must spurn they must spurn
V-ing form
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
I must have spurned you must have spurned he must have spurned we must have spurned you must have spurned they must have spurned
V-ing perfect
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
I mustn't spurn you mustn't spurn he mustn't spurn we mustn't spurn you mustn't spurn they mustn't spurn
V-ing form
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
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
V-ing perfect
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
must I spurn? must you spurn? must he spurn? must we spurn? must you spurn? must they spurn?
V-ing form
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
must I have spurned? must you have spurned? must he have spurned? must we have spurned? must you have spurned? must they have spurned?
V-ing perfect
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
mustn't I spurn? mustn't you spurn? mustn't he spurn? mustn't we spurn? mustn't you spurn? mustn't they spurn?
V-ing form
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
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?
V-ing perfect
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?