English verb conjugation
SHOULD SPAR

Regular verb: spar - sparred - sparred

Affirmation

Simple form	V-ing form
I should spar you should spar he should spar we should spar you should spar they should spar	I should be sparring you should be sparring he should be sparring we should be sparring you should be sparring they should be sparring
Perfect	V-ing perfect
I should have sparred you should have sparred he should have sparred we should have sparred you should have sparred they should have sparred	I should have been sparring you should have been sparring he should have been sparring we should have been sparring you should have been sparring they should have been sparring

Negation

Simple form	V-ing form
I should not spar you should not spar he should not spar we should not spar you should not spar they should not spar	I should not be sparring you should not be sparring he should not be sparring we should not be sparring you should not be sparring they should not be sparring
Perfect	V-ing perfect
I should not have sparred you should not have sparred he should not have sparred we should not have sparred you should not have sparred they should not have sparred	I should not have been sparring you should not have been sparring he should not have been sparring we should not have been sparring you should not have been sparring they should not have been sparring

Interrogative form

Simple form	V-ing form
should I spar? should you spar? should he spar? should we spar? should you spar? should they spar?	should I be sparring? should you be sparring? should he be sparring? should we be sparring? should you be sparring? should they be sparring?
Perfect	V-ing perfect
should I have sparred? should you have sparred? should he have sparred? should we have sparred? should you have sparred? should they have sparred?	should I have been sparring? should you have been sparring? should he have been sparring? should we have been sparring? should you have been sparring? should they have been sparring?

Interro-negative form

Simple form	V-ing form
should I not spar? should you not spar? should he not spar? should we not spar? should you not spar? should they not spar?	should I not be sparring? should you not be sparring? should he not be sparring? should we not be sparring? should you not be sparring? should they not be sparring?
Perfect	V-ing perfect
should I not have sparred? should you not have sparred? should he not have sparred? should we not have sparred? should you not have sparred? should they not have sparred?	should I not have been sparring? should you not have been sparring? should he not have been sparring? should we not have been sparring? should you not have been sparring? should they not have been sparring?