I concertina you concertina he concertinas we concertina you concertina they concertina
Present continuous
I am concertinaing you are concertinaing he is concertinaing we are concertinaing you are concertinaing they are concertinaing
Preterite
I concertinaed you concertinaed he concertinaed we concertinaed you concertinaed they concertinaed
Preterite continuous
I was concertinaing you were concertinaing he was concertinaing we were concertinaing you were concertinaing they were concertinaing
Present perfect
I have concertinaed you have concertinaed he has concertinaed we have concertinaed you have concertinaed they have concertinaed
Present perfect continuous
I have been concertinaing you have been concertinaing he has been concertinaing we have been concertinaing you have been concertinaing they have been concertinaing
Pluperfect
I had concertinaed you had concertinaed he had concertinaed we had concertinaed you had concertinaed they had concertinaed
Pluperfect continuous
I had been concertinaing you had been concertinaing he had been concertinaing we had been concertinaing you had been concertinaing they had been concertinaing
Future
I will concertina you will concertina he will concertina we will concertina you will concertina they will concertina
Future continuous
I will be concertinaing you will be concertinaing he will be concertinaing we will be concertinaing you will be concertinaing they will be concertinaing
Future perfect
I will have concertinaed you will have concertinaed he will have concertinaed we will have concertinaed you will have concertinaed they will have concertinaed
Future perfect continuous
I will have been concertinaing you will have been concertinaing he will have been concertinaing we will have been concertinaing you will have been concertinaing they will have been concertinaing
Conditional
Present
I would concertina you would concertina he would concertina we would concertina you would concertina they would concertina
Present continuous
I would be concertinaing you would be concertinaing he would be concertinaing we would be concertinaing you would be concertinaing they would be concertinaing
Past
I would have concertinaed you would have concertinaed he would have concertinaed we would have concertinaed you would have concertinaed they would have concertinaed
Past continuous
I would have been concertinaing you would have been concertinaing he would have been concertinaing we would have been concertinaing you would have been concertinaing they would have been concertinaing