English verb conjugation
SHOULD BACKCHECK

Regular verb: backcheck - backchecked - backchecked

Affirmation

Simple form	V-ing form
I'd backcheck you'd backcheck he'd backcheck we'd backcheck you'd backcheck they'd backcheck	I'd be backchecking you'd be backchecking he'd be backchecking we'd be backchecking you'd be backchecking they'd be backchecking
Perfect	V-ing perfect
I should've backchecked you should've backchecked he should've backchecked we should've backchecked you should've backchecked they should've backchecked	I should've been backchecking you should've been backchecking he should've been backchecking we should've been backchecking you should've been backchecking they should've been backchecking

Negation

Simple form	V-ing form
I shouldn't backcheck you shouldn't backcheck he shouldn't backcheck we shouldn't backcheck you shouldn't backcheck they shouldn't backcheck	I shouldn't be backchecking you shouldn't be backchecking he shouldn't be backchecking we shouldn't be backchecking you shouldn't be backchecking they shouldn't be backchecking
Perfect	V-ing perfect
I shouldn't have backchecked you shouldn't have backchecked he shouldn't have backchecked we shouldn't have backchecked you shouldn't have backchecked they shouldn't have backchecked	I shouldn't have been backchecking you shouldn't have been backchecking he shouldn't have been backchecking we shouldn't have been backchecking you shouldn't have been backchecking they shouldn't have been backchecking

Interrogative form

Simple form	V-ing form
should I backcheck? should you backcheck? should he backcheck? should we backcheck? should you backcheck? should they backcheck?	should I be backchecking? should you be backchecking? should he be backchecking? should we be backchecking? should you be backchecking? should they be backchecking?
Perfect	V-ing perfect
should I have backchecked? should you have backchecked? should he have backchecked? should we have backchecked? should you have backchecked? should they have backchecked?	should I have been backchecking? should you have been backchecking? should he have been backchecking? should we have been backchecking? should you have been backchecking? should they have been backchecking?

Interro-negative form

Simple form	V-ing form
shouldn't I backcheck? shouldn't you backcheck? shouldn't he backcheck? shouldn't we backcheck? shouldn't you backcheck? shouldn't they backcheck?	shouldn't I be backchecking? shouldn't you be backchecking? shouldn't he be backchecking? shouldn't we be backchecking? shouldn't you be backchecking? shouldn't they be backchecking?
Perfect	V-ing perfect
shouldn't I have backchecked? shouldn't you have backchecked? shouldn't he have backchecked? shouldn't we have backchecked? shouldn't you have backchecked? shouldn't they have backchecked?	shouldn't I have been backchecking? shouldn't you have been backchecking? shouldn't he have been backchecking? shouldn't we have been backchecking? shouldn't you have been backchecking? shouldn't they have been backchecking?