English verb conjugation
SHOULD BOX

Regular verb: box - boxed - boxed

Affirmation

Simple form	V-ing form
I should box you should box she should box we should box you should box they should box	I should be boxing you should be boxing she should be boxing we should be boxing you should be boxing they should be boxing
Perfect	V-ing perfect
I should have boxed you should have boxed she should have boxed we should have boxed you should have boxed they should have boxed	I should have been boxing you should have been boxing she should have been boxing we should have been boxing you should have been boxing they should have been boxing

Negation

Simple form	V-ing form
I should not box you should not box she should not box we should not box you should not box they should not box	I should not be boxing you should not be boxing she should not be boxing we should not be boxing you should not be boxing they should not be boxing
Perfect	V-ing perfect
I should not have boxed you should not have boxed she should not have boxed we should not have boxed you should not have boxed they should not have boxed	I should not have been boxing you should not have been boxing she should not have been boxing we should not have been boxing you should not have been boxing they should not have been boxing

Interrogative form

Simple form	V-ing form
should I box? should you box? should she box? should we box? should you box? should they box?	should I be boxing? should you be boxing? should she be boxing? should we be boxing? should you be boxing? should they be boxing?
Perfect	V-ing perfect
should I have boxed? should you have boxed? should she have boxed? should we have boxed? should you have boxed? should they have boxed?	should I have been boxing? should you have been boxing? should she have been boxing? should we have been boxing? should you have been boxing? should they have been boxing?

Interro-negative form

Simple form	V-ing form
should I not box? should you not box? should she not box? should we not box? should you not box? should they not box?	should I not be boxing? should you not be boxing? should she not be boxing? should we not be boxing? should you not be boxing? should they not be boxing?
Perfect	V-ing perfect
should I not have boxed? should you not have boxed? should she not have boxed? should we not have boxed? should you not have boxed? should they not have boxed?	should I not have been boxing? should you not have been boxing? should she not have been boxing? should we not have been boxing? should you not have been boxing? should they not have been boxing?