YOU SAID:

How is the end of the world going to happen?

INTO JAPANESE

どのように世界の終わりが起こるでしょうか？

BACK INTO ENGLISH

How will the world's end happen?

INTO JAPANESE

世界が終わるのでしょうか。

BACK INTO ENGLISH

I wonder if the world ends.

INTO JAPANESE

世界が終わるのだろうか。

BACK INTO ENGLISH

I wonder if the world will end.

INTO JAPANESE

私は世界が終わるのだろうかと思います。

BACK INTO ENGLISH

I wonder if the world will end.