English verb conjugation
SHOULD SHARPEN

Regular verb: sharpen - sharpened - sharpened

Affirmation

Simple form	V-ing form
I should sharpen you should sharpen he should sharpen we should sharpen you should sharpen they should sharpen	I should be sharpening you should be sharpening he should be sharpening we should be sharpening you should be sharpening they should be sharpening
Perfect	V-ing perfect
I should have sharpened you should have sharpened he should have sharpened we should have sharpened you should have sharpened they should have sharpened	I should have been sharpening you should have been sharpening he should have been sharpening we should have been sharpening you should have been sharpening they should have been sharpening

Negation

Simple form	V-ing form
I should not sharpen you should not sharpen he should not sharpen we should not sharpen you should not sharpen they should not sharpen	I should not be sharpening you should not be sharpening he should not be sharpening we should not be sharpening you should not be sharpening they should not be sharpening
Perfect	V-ing perfect
I should not have sharpened you should not have sharpened he should not have sharpened we should not have sharpened you should not have sharpened they should not have sharpened	I should not have been sharpening you should not have been sharpening he should not have been sharpening we should not have been sharpening you should not have been sharpening they should not have been sharpening

Interrogative form

Simple form	V-ing form
should I sharpen? should you sharpen? should he sharpen? should we sharpen? should you sharpen? should they sharpen?	should I be sharpening? should you be sharpening? should he be sharpening? should we be sharpening? should you be sharpening? should they be sharpening?
Perfect	V-ing perfect
should I have sharpened? should you have sharpened? should he have sharpened? should we have sharpened? should you have sharpened? should they have sharpened?	should I have been sharpening? should you have been sharpening? should he have been sharpening? should we have been sharpening? should you have been sharpening? should they have been sharpening?

Interro-negative form

Simple form	V-ing form
should I not sharpen? should you not sharpen? should he not sharpen? should we not sharpen? should you not sharpen? should they not sharpen?	should I not be sharpening? should you not be sharpening? should he not be sharpening? should we not be sharpening? should you not be sharpening? should they not be sharpening?
Perfect	V-ing perfect
should I not have sharpened? should you not have sharpened? should he not have sharpened? should we not have sharpened? should you not have sharpened? should they not have sharpened?	should I not have been sharpening? should you not have been sharpening? should he not have been sharpening? should we not have been sharpening? should you not have been sharpening? should they not have been sharpening?