I'd be concertinaing you'd be concertinaing he'd be concertinaing we'd be concertinaing you'd be concertinaing they'd be concertinaing
Perfect
I should've concertinaed you should've concertinaed he should've concertinaed we should've concertinaed you should've concertinaed they should've concertinaed
V-ing perfect
I should've been concertinaing you should've been concertinaing he should've been concertinaing we should've been concertinaing you should've been concertinaing they should've been concertinaing
Negation
Simple form
I shouldn't concertina you shouldn't concertina he shouldn't concertina we shouldn't concertina you shouldn't concertina they shouldn't concertina
V-ing form
I shouldn't be concertinaing you shouldn't be concertinaing he shouldn't be concertinaing we shouldn't be concertinaing you shouldn't be concertinaing they shouldn't be concertinaing
Perfect
I shouldn't have concertinaed you shouldn't have concertinaed he shouldn't have concertinaed we shouldn't have concertinaed you shouldn't have concertinaed they shouldn't have concertinaed
V-ing perfect
I shouldn't have been concertinaing you shouldn't have been concertinaing he shouldn't have been concertinaing we shouldn't have been concertinaing you shouldn't have been concertinaing they shouldn't have been concertinaing
Interrogative form
Simple form
should I concertina? should you concertina? should he concertina? should we concertina? should you concertina? should they concertina?
V-ing form
should I be concertinaing? should you be concertinaing? should he be concertinaing? should we be concertinaing? should you be concertinaing? should they be concertinaing?
Perfect
should I have concertinaed? should you have concertinaed? should he have concertinaed? should we have concertinaed? should you have concertinaed? should they have concertinaed?
V-ing perfect
should I have been concertinaing? should you have been concertinaing? should he have been concertinaing? should we have been concertinaing? should you have been concertinaing? should they have been concertinaing?
Interro-negative form
Simple form
shouldn't I concertina? shouldn't you concertina? shouldn't he concertina? shouldn't we concertina? shouldn't you concertina? shouldn't they concertina?
V-ing form
shouldn't I be concertinaing? shouldn't you be concertinaing? shouldn't he be concertinaing? shouldn't we be concertinaing? shouldn't you be concertinaing? shouldn't they be concertinaing?
Perfect
shouldn't I have concertinaed? shouldn't you have concertinaed? shouldn't he have concertinaed? shouldn't we have concertinaed? shouldn't you have concertinaed? shouldn't they have concertinaed?
V-ing perfect
shouldn't I have been concertinaing? shouldn't you have been concertinaing? shouldn't he have been concertinaing? shouldn't we have been concertinaing? shouldn't you have been concertinaing? shouldn't they have been concertinaing?