I should concertina you should concertina she should concertina we should concertina you should concertina they should concertina
V-ing form
I should be concertinaing you should be concertinaing she should be concertinaing we should be concertinaing you should be concertinaing they should be concertinaing
Perfect
I should have concertinaed you should have concertinaed she should have concertinaed we should have concertinaed you should have concertinaed they should have concertinaed
V-ing perfect
I should have been concertinaing you should have been concertinaing she should have been concertinaing we should have been concertinaing you should have been concertinaing they should have been concertinaing
Negation
Simple form
I should not concertina you should not concertina she should not concertina we should not concertina you should not concertina they should not concertina
V-ing form
I should not be concertinaing you should not be concertinaing she should not be concertinaing we should not be concertinaing you should not be concertinaing they should not be concertinaing
Perfect
I should not have concertinaed you should not have concertinaed she should not have concertinaed we should not have concertinaed you should not have concertinaed they should not have concertinaed
V-ing perfect
I should not have been concertinaing you should not have been concertinaing she should not have been concertinaing we should not have been concertinaing you should not have been concertinaing they should not have been concertinaing
Interrogative form
Simple form
should I concertina? should you concertina? should she concertina? should we concertina? should you concertina? should they concertina?
V-ing form
should I be concertinaing? should you be concertinaing? should she be concertinaing? should we be concertinaing? should you be concertinaing? should they be concertinaing?
Perfect
should I have concertinaed? should you have concertinaed? should she 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 she have been concertinaing? should we have been concertinaing? should you have been concertinaing? should they have been concertinaing?
Interro-negative form
Simple form
should I not concertina? should you not concertina? should she not concertina? should we not concertina? should you not concertina? should they not concertina?
V-ing form
should I not be concertinaing? should you not be concertinaing? should she not be concertinaing? should we not be concertinaing? should you not be concertinaing? should they not be concertinaing?
Perfect
should I not have concertinaed? should you not have concertinaed? should she not have concertinaed? should we not have concertinaed? should you not have concertinaed? should they not have concertinaed?
V-ing perfect
should I not have been concertinaing? should you not have been concertinaing? should she not have been concertinaing? should we not have been concertinaing? should you not have been concertinaing? should they not have been concertinaing?