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 must not spurn you must not spurn he must not spurn we must not spurn you must not spurn they must not spurn
V-ing form
I must not be spurning you must not be spurning he must not be spurning we must not be spurning you must not be spurning they must not be spurning
Perfect
I must not have spurned you must not have spurned he must not have spurned we must not have spurned you must not have spurned they must not have spurned
V-ing perfect
I must not have been spurning you must not have been spurning he must not have been spurning we must not have been spurning you must not have been spurning they must not 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
must I not spurn? must you not spurn? must he not spurn? must we not spurn? must you not spurn? must they not spurn?
V-ing form
must I not be spurning? must you not be spurning? must he not be spurning? must we not be spurning? must you not be spurning? must they not be spurning?
Perfect
must I not have spurned? must you not have spurned? must he not have spurned? must we not have spurned? must you not have spurned? must they not have spurned?
V-ing perfect
must I not have been spurning? must you not have been spurning? must he not have been spurning? must we not have been spurning? must you not have been spurning? must they not have been spurning?