YOU SAID:
Could've, should've, would've.
INTO JAPANESE
すべきだったでしょうか?
BACK INTO ENGLISH
Should I have done it?
INTO JAPANESE
私はそれをしなければなりませんか?
BACK INTO ENGLISH
Do I have to do it?
INTO JAPANESE
どうして僕が?
BACK INTO ENGLISH
Well, why would I?
INTO JAPANESE
どうして僕が?
BACK INTO ENGLISH
Well, why would I?
That didn't even make that much sense in English.