English verb conjugation
SHOULD WHITEN

Regular verb: whiten - whitened - whitened

Affirmation

Simple form	V-ing form
I should whiten you should whiten he should whiten we should whiten you should whiten they should whiten	I should be whitening you should be whitening he should be whitening we should be whitening you should be whitening they should be whitening
Perfect	V-ing perfect
I should have whitened you should have whitened he should have whitened we should have whitened you should have whitened they should have whitened	I should have been whitening you should have been whitening he should have been whitening we should have been whitening you should have been whitening they should have been whitening

Negation

Simple form	V-ing form
I should not whiten you should not whiten he should not whiten we should not whiten you should not whiten they should not whiten	I should not be whitening you should not be whitening he should not be whitening we should not be whitening you should not be whitening they should not be whitening
Perfect	V-ing perfect
I should not have whitened you should not have whitened he should not have whitened we should not have whitened you should not have whitened they should not have whitened	I should not have been whitening you should not have been whitening he should not have been whitening we should not have been whitening you should not have been whitening they should not have been whitening

Interrogative form

Simple form	V-ing form
should I whiten? should you whiten? should he whiten? should we whiten? should you whiten? should they whiten?	should I be whitening? should you be whitening? should he be whitening? should we be whitening? should you be whitening? should they be whitening?
Perfect	V-ing perfect
should I have whitened? should you have whitened? should he have whitened? should we have whitened? should you have whitened? should they have whitened?	should I have been whitening? should you have been whitening? should he have been whitening? should we have been whitening? should you have been whitening? should they have been whitening?

Interro-negative form

Simple form	V-ing form
should I not whiten? should you not whiten? should he not whiten? should we not whiten? should you not whiten? should they not whiten?	should I not be whitening? should you not be whitening? should he not be whitening? should we not be whitening? should you not be whitening? should they not be whitening?
Perfect	V-ing perfect
should I not have whitened? should you not have whitened? should he not have whitened? should we not have whitened? should you not have whitened? should they not have whitened?	should I not have been whitening? should you not have been whitening? should he not have been whitening? should we not have been whitening? should you not have been whitening? should they not have been whitening?