English verb conjugation
CAN SPUR

Regular verb: spur - spurred - spurred

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I can't spur you can't spur he can't spur we can't spur you can't spur they can't spur	I can't be spurring you can't be spurring he can't be spurring we can't be spurring you can't be spurring they can't be spurring
Perfect	V-ing perfect
I can't have spurred you can't have spurred he can't have spurred we can't have spurred you can't have spurred they can't have spurred	I can't have been spurring you can't have been spurring he can't have been spurring we can't have been spurring you can't have been spurring they can't have been spurring

Interrogative form

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