English verb conjugation
SHOULD CONCUSS

Regular verb: concuss - concussed - concussed

Affirmation

Simple form	V-ing form
I'd concuss you'd concuss he'd concuss we'd concuss you'd concuss they'd concuss	I'd be concussing you'd be concussing he'd be concussing we'd be concussing you'd be concussing they'd be concussing
Perfect	V-ing perfect
I should've concussed you should've concussed he should've concussed we should've concussed you should've concussed they should've concussed	I should've been concussing you should've been concussing he should've been concussing we should've been concussing you should've been concussing they should've been concussing

Negation

Simple form	V-ing form
I shouldn't concuss you shouldn't concuss he shouldn't concuss we shouldn't concuss you shouldn't concuss they shouldn't concuss	I shouldn't be concussing you shouldn't be concussing he shouldn't be concussing we shouldn't be concussing you shouldn't be concussing they shouldn't be concussing
Perfect	V-ing perfect
I shouldn't have concussed you shouldn't have concussed he shouldn't have concussed we shouldn't have concussed you shouldn't have concussed they shouldn't have concussed	I shouldn't have been concussing you shouldn't have been concussing he shouldn't have been concussing we shouldn't have been concussing you shouldn't have been concussing they shouldn't have been concussing

Interrogative form

Simple form	V-ing form
should I concuss? should you concuss? should he concuss? should we concuss? should you concuss? should they concuss?	should I be concussing? should you be concussing? should he be concussing? should we be concussing? should you be concussing? should they be concussing?
Perfect	V-ing perfect
should I have concussed? should you have concussed? should he have concussed? should we have concussed? should you have concussed? should they have concussed?	should I have been concussing? should you have been concussing? should he have been concussing? should we have been concussing? should you have been concussing? should they have been concussing?

Interro-negative form

Simple form	V-ing form
shouldn't I concuss? shouldn't you concuss? shouldn't he concuss? shouldn't we concuss? shouldn't you concuss? shouldn't they concuss?	shouldn't I be concussing? shouldn't you be concussing? shouldn't he be concussing? shouldn't we be concussing? shouldn't you be concussing? shouldn't they be concussing?
Perfect	V-ing perfect
shouldn't I have concussed? shouldn't you have concussed? shouldn't he have concussed? shouldn't we have concussed? shouldn't you have concussed? shouldn't they have concussed?	shouldn't I have been concussing? shouldn't you have been concussing? shouldn't he have been concussing? shouldn't we have been concussing? shouldn't you have been concussing? shouldn't they have been concussing?