can spur
Regular verb: spur - spurred- spurred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can spur
you can spur
he can spur
we can spur
you can spur
they can spur 	I can be spurring
you can be spurring
he can be spurring
we can be spurring
you can be spurring
they can be spurring	I can have spurred
you can have spurred
he can have spurred
we can have spurred
you can have spurred
they can have spurred	I can have been spurring
you can have been spurring
he can have been spurring
we can have been spurring
you can have been spurring
they can have been spurring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot spur
you cannot spur
he cannot spur
we cannot spur
you cannot spur
they cannot spur 	I cannot be spurring
you cannot be spurring
he cannot be spurring
we cannot be spurring
you cannot be spurring
they cannot be spurring	I cannot have spurred
you cannot have spurred
he cannot have spurred
we cannot have spurred
you cannot have spurred
they cannot have spurred	I cannot have been spurring
you cannot have been spurring
he cannot have been spurring
we cannot have been spurring
you cannot have been spurring
they cannot have been spurring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I spur?
can you spur?
can he spur?
can we spur?
can you spur?
can they spur? 	can I be spurring?
can you be spurring?
can he be spurring?
can we be spurring?
can you be spurring?
can they be spurring? 	can I have spurred?
can you have spurred?
can he have spurred?
can we have spurred?
can you have spurred?
can they have spurred? 	can I have been spurring?
can you have been spurring?
can he have been spurring?
can we have been spurring?
can you have been spurring?
can they have been spurring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not spur?
can you not spur?
can he not spur?
can we not spur?
can you not spur?
can they not spur? 	can I not be spurring?
can you not be spurring?
can he not be spurring?
can we not be spurring?
can you not be spurring?
can they not be spurring? 	can I not have spurred?
can you not have spurred?
can he not have spurred?
can we not have spurred?
can you not have spurred?
can they not have spurred? 	can I not have been spurring?
can you not have been spurring?
can he not have been spurring?
can we not have been spurring?
can you not have been spurring?
can they not have been spurring?