English verb conjugation
SHOULD PURCHASE

Regular verb: purchase - purchased - purchased

Affirmation

Simple form	V-ing form
I should purchase you should purchase he should purchase we should purchase you should purchase they should purchase	I should be purchasing you should be purchasing he should be purchasing we should be purchasing you should be purchasing they should be purchasing
Perfect	V-ing perfect
I should have purchased you should have purchased he should have purchased we should have purchased you should have purchased they should have purchased	I should have been purchasing you should have been purchasing he should have been purchasing we should have been purchasing you should have been purchasing they should have been purchasing

Negation

Simple form	V-ing form
I should not purchase you should not purchase he should not purchase we should not purchase you should not purchase they should not purchase	I should not be purchasing you should not be purchasing he should not be purchasing we should not be purchasing you should not be purchasing they should not be purchasing
Perfect	V-ing perfect
I should not have purchased you should not have purchased he should not have purchased we should not have purchased you should not have purchased they should not have purchased	I should not have been purchasing you should not have been purchasing he should not have been purchasing we should not have been purchasing you should not have been purchasing they should not have been purchasing

Interrogative form

Simple form	V-ing form
should I purchase? should you purchase? should he purchase? should we purchase? should you purchase? should they purchase?	should I be purchasing? should you be purchasing? should he be purchasing? should we be purchasing? should you be purchasing? should they be purchasing?
Perfect	V-ing perfect
should I have purchased? should you have purchased? should he have purchased? should we have purchased? should you have purchased? should they have purchased?	should I have been purchasing? should you have been purchasing? should he have been purchasing? should we have been purchasing? should you have been purchasing? should they have been purchasing?

Interro-negative form

Simple form	V-ing form
should I not purchase? should you not purchase? should he not purchase? should we not purchase? should you not purchase? should they not purchase?	should I not be purchasing? should you not be purchasing? should he not be purchasing? should we not be purchasing? should you not be purchasing? should they not be purchasing?
Perfect	V-ing perfect
should I not have purchased? should you not have purchased? should he not have purchased? should we not have purchased? should you not have purchased? should they not have purchased?	should I not have been purchasing? should you not have been purchasing? should he not have been purchasing? should we not have been purchasing? should you not have been purchasing? should they not have been purchasing?