English verb conjugation
SHOULD BIFF

Regular verb: biff - biffed - biffed

Affirmation

Simple form	V-ing form
I should biff you should biff he should biff we should biff you should biff they should biff	I should be biffing you should be biffing he should be biffing we should be biffing you should be biffing they should be biffing
Perfect	V-ing perfect
I should have biffed you should have biffed he should have biffed we should have biffed you should have biffed they should have biffed	I should have been biffing you should have been biffing he should have been biffing we should have been biffing you should have been biffing they should have been biffing

Negation

Simple form	V-ing form
I should not biff you should not biff he should not biff we should not biff you should not biff they should not biff	I should not be biffing you should not be biffing he should not be biffing we should not be biffing you should not be biffing they should not be biffing
Perfect	V-ing perfect
I should not have biffed you should not have biffed he should not have biffed we should not have biffed you should not have biffed they should not have biffed	I should not have been biffing you should not have been biffing he should not have been biffing we should not have been biffing you should not have been biffing they should not have been biffing

Interrogative form

Simple form	V-ing form
should I biff? should you biff? should he biff? should we biff? should you biff? should they biff?	should I be biffing? should you be biffing? should he be biffing? should we be biffing? should you be biffing? should they be biffing?
Perfect	V-ing perfect
should I have biffed? should you have biffed? should he have biffed? should we have biffed? should you have biffed? should they have biffed?	should I have been biffing? should you have been biffing? should he have been biffing? should we have been biffing? should you have been biffing? should they have been biffing?

Interro-negative form

Simple form	V-ing form
should I not biff? should you not biff? should he not biff? should we not biff? should you not biff? should they not biff?	should I not be biffing? should you not be biffing? should he not be biffing? should we not be biffing? should you not be biffing? should they not be biffing?
Perfect	V-ing perfect
should I not have biffed? should you not have biffed? should he not have biffed? should we not have biffed? should you not have biffed? should they not have biffed?	should I not have been biffing? should you not have been biffing? should he not have been biffing? should we not have been biffing? should you not have been biffing? should they not have been biffing?