I can spurn you can spurn he can spurn we can spurn you can spurn they can spurn
V-ing form
I can be spurning you can be spurning he can be spurning we can be spurning you can be spurning they can be spurning
Perfect
I can have spurned you can have spurned he can have spurned we can have spurned you can have spurned they can have spurned
V-ing perfect
I can have been spurning you can have been spurning he can have been spurning we can have been spurning you can have been spurning they can have been spurning
Negation
Simple form
I cannot spurn you cannot spurn he cannot spurn we cannot spurn you cannot spurn they cannot spurn
V-ing form
I cannot be spurning you cannot be spurning he cannot be spurning we cannot be spurning you cannot be spurning they cannot be spurning
Perfect
I cannot have spurned you cannot have spurned he cannot have spurned we cannot have spurned you cannot have spurned they cannot have spurned
V-ing perfect
I cannot have been spurning you cannot have been spurning he cannot have been spurning we cannot have been spurning you cannot have been spurning they cannot have been spurning
Interrogative form
Simple form
can I spurn? can you spurn? can he spurn? can we spurn? can you spurn? can they spurn?
V-ing form
can I be spurning? can you be spurning? can he be spurning? can we be spurning? can you be spurning? can they be spurning?
Perfect
can I have spurned? can you have spurned? can he have spurned? can we have spurned? can you have spurned? can they have spurned?
V-ing perfect
can I have been spurning? can you have been spurning? can he have been spurning? can we have been spurning? can you have been spurning? can they have been spurning?
Interro-negative form
Simple form
can I not spurn? can you not spurn? can he not spurn? can we not spurn? can you not spurn? can they not spurn?
V-ing form
can I not be spurning? can you not be spurning? can he not be spurning? can we not be spurning? can you not be spurning? can they not be spurning?
Perfect
can I not have spurned? can you not have spurned? can he not have spurned? can we not have spurned? can you not have spurned? can they not have spurned?
V-ing perfect
can I not have been spurning? can you not have been spurning? can he not have been spurning? can we not have been spurning? can you not have been spurning? can they not have been spurning?