Conjugación del verbo inglés
COULD CONCERTINA

Verbo regular: concertina - concertinaed - concertinaed

Afirmación

Forma simple	Forma con V-ing
I could concertina you could concertina he could concertina we could concertina you could concertina they could concertina	I could be concertinaing you could be concertinaing he could be concertinaing we could be concertinaing you could be concertinaing they could be concertinaing
Perfecto	Perfecto con V-ing
I could have concertinaed you could have concertinaed he could have concertinaed we could have concertinaed you could have concertinaed they could have concertinaed	I could have been concertinaing you could have been concertinaing he could have been concertinaing we could have been concertinaing you could have been concertinaing they could have been concertinaing

Negación

Forma simple	Forma con V-ing
I couldn't concertina you couldn't concertina he couldn't concertina we couldn't concertina you couldn't concertina they couldn't concertina	I couldn't be concertinaing you couldn't be concertinaing he couldn't be concertinaing we couldn't be concertinaing you couldn't be concertinaing they couldn't be concertinaing
Perfecto	Perfecto con V-ing
I couldn't have concertinaed you couldn't have concertinaed he couldn't have concertinaed we couldn't have concertinaed you couldn't have concertinaed they couldn't have concertinaed	I couldn't have been concertinaing you couldn't have been concertinaing he couldn't have been concertinaing we couldn't have been concertinaing you couldn't have been concertinaing they couldn't have been concertinaing

Forma interrogativa

Forma simple	Forma con V-ing
could I concertina? could you concertina? could he concertina? could we concertina? could you concertina? could they concertina?	could I be concertinaing? could you be concertinaing? could he be concertinaing? could we be concertinaing? could you be concertinaing? could they be concertinaing?
Perfecto	Perfecto con V-ing
could I have concertinaed? could you have concertinaed? could he have concertinaed? could we have concertinaed? could you have concertinaed? could they have concertinaed?	could I have been concertinaing? could you have been concertinaing? could he have been concertinaing? could we have been concertinaing? could you have been concertinaing? could they have been concertinaing?

Forma interro-negativa

Forma simple	Forma con V-ing
couldn't I concertina? couldn't you concertina? couldn't he concertina? couldn't we concertina? couldn't you concertina? couldn't they concertina?	couldn't I be concertinaing? couldn't you be concertinaing? couldn't he be concertinaing? couldn't we be concertinaing? couldn't you be concertinaing? couldn't they be concertinaing?
Perfecto	Perfecto con V-ing
couldn't I have concertinaed? couldn't you have concertinaed? couldn't he have concertinaed? couldn't we have concertinaed? couldn't you have concertinaed? couldn't they have concertinaed?	couldn't I have been concertinaing? couldn't you have been concertinaing? couldn't he have been concertinaing? couldn't we have been concertinaing? couldn't you have been concertinaing? couldn't they have been concertinaing?