English verb conjugation
CAN SPUR

Regular verb: spur - spurred - spurred

Affirmation

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