YOU SAID:

I want to know why dogs must walk on four legs.

INTO JAPANESE

私は犬が4本の足を歩く必要がある理由を知りたい。

BACK INTO ENGLISH

I want to know why a dog needs to walk four legs.

INTO JAPANESE

私は犬が4本の足を歩く必要がある理由を知りたい。

BACK INTO ENGLISH

I want to know why a dog needs to walk four legs.