YOU SAID:
why is the sky blue if it could be green?
INTO JAPANESE
それが緑になることができれば、なぜ空は青ですか?
BACK INTO ENGLISH
If it can be green, why is the sky blue?
INTO JAPANESE
それが緑にできるなら、なぜ空は青いのですか?
BACK INTO ENGLISH
If it can be green, why is the sky blue?
You've done this before, haven't you.