English verb conjugation
SHOULD KNIFE

Regular verb: knife - knifed - knifed

Affirmation

Simple form	V-ing form
I should knife you should knife he should knife we should knife you should knife they should knife	I should be knifing you should be knifing he should be knifing we should be knifing you should be knifing they should be knifing
Perfect	V-ing perfect
I should have knifed you should have knifed he should have knifed we should have knifed you should have knifed they should have knifed	I should have been knifing you should have been knifing he should have been knifing we should have been knifing you should have been knifing they should have been knifing

Negation

Simple form	V-ing form
I should not knife you should not knife he should not knife we should not knife you should not knife they should not knife	I should not be knifing you should not be knifing he should not be knifing we should not be knifing you should not be knifing they should not be knifing
Perfect	V-ing perfect
I should not have knifed you should not have knifed he should not have knifed we should not have knifed you should not have knifed they should not have knifed	I should not have been knifing you should not have been knifing he should not have been knifing we should not have been knifing you should not have been knifing they should not have been knifing

Interrogative form

Simple form	V-ing form
should I knife? should you knife? should he knife? should we knife? should you knife? should they knife?	should I be knifing? should you be knifing? should he be knifing? should we be knifing? should you be knifing? should they be knifing?
Perfect	V-ing perfect
should I have knifed? should you have knifed? should he have knifed? should we have knifed? should you have knifed? should they have knifed?	should I have been knifing? should you have been knifing? should he have been knifing? should we have been knifing? should you have been knifing? should they have been knifing?

Interro-negative form

Simple form	V-ing form
should I not knife? should you not knife? should he not knife? should we not knife? should you not knife? should they not knife?	should I not be knifing? should you not be knifing? should he not be knifing? should we not be knifing? should you not be knifing? should they not be knifing?
Perfect	V-ing perfect
should I not have knifed? should you not have knifed? should he not have knifed? should we not have knifed? should you not have knifed? should they not have knifed?	should I not have been knifing? should you not have been knifing? should he not have been knifing? should we not have been knifing? should you not have been knifing? should they not have been knifing?