English verb conjugation
SHOULD CONCERTINA

Regular verb: concertina - concertinaed - concertinaed

Affirmation

Simple form	V-ing form
I should concertina you should concertina he should concertina we should concertina you should concertina they should concertina	I should be concertinaing you should be concertinaing he should be concertinaing we should be concertinaing you should be concertinaing they should be concertinaing
Perfect	V-ing perfect
I should have concertinaed you should have concertinaed he should have concertinaed we should have concertinaed you should have concertinaed they should have concertinaed	I should have been concertinaing you should have been concertinaing he should have been concertinaing we should have been concertinaing you should have been concertinaing they should have been concertinaing

Negation

Simple form	V-ing form
I should not concertina you should not concertina he should not concertina we should not concertina you should not concertina they should not concertina	I should not be concertinaing you should not be concertinaing he should not be concertinaing we should not be concertinaing you should not be concertinaing they should not be concertinaing
Perfect	V-ing perfect
I should not have concertinaed you should not have concertinaed he should not have concertinaed we should not have concertinaed you should not have concertinaed they should not have concertinaed	I should not have been concertinaing you should not have been concertinaing he 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	V-ing form
should I concertina? should you concertina? should he concertina? should we concertina? should you concertina? should they concertina?	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	V-ing 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?	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	V-ing form
should I not concertina? should you not concertina? should he not concertina? should we not concertina? should you not concertina? should they not concertina?	should I not be concertinaing? should you not be concertinaing? should he not be concertinaing? should we not be concertinaing? should you not be concertinaing? should they not be concertinaing?
Perfect	V-ing perfect
should I not have concertinaed? should you not have concertinaed? should he not have concertinaed? should we not have concertinaed? should you not have concertinaed? should they not have concertinaed?	should I not have been concertinaing? should you not have been concertinaing? should he not have been concertinaing? should we not have been concertinaing? should you not have been concertinaing? should they not have been concertinaing?