YOU SAID:

I never knew that hippos are friends with humans and dogs

INTO JAPANESE

カバが人間や犬と友達であることを私は決して知りませんでした

BACK INTO ENGLISH

I never knew Hippo was friends with humans and dogs

INTO JAPANESE

私はカバが人間や犬と友達だったことを知らなかった

BACK INTO ENGLISH

I did not know that hippopotamus were friends with humans and dogs

INTO JAPANESE

カバが人間や犬と友達であることを知りませんでした

BACK INTO ENGLISH

I did not know that Hippo was friends with humans and dogs

INTO JAPANESE

カバが人間や犬と友達だったことを知りませんでした

BACK INTO ENGLISH

I did not know that Hippo was friends with human beings and dogs

INTO JAPANESE

カバが人間や犬と友達だったことを知りません

BACK INTO ENGLISH

I do not know that Hippo was friends with humans and dogs

INTO JAPANESE

カバが人間や犬と友達だったことはわかりません

BACK INTO ENGLISH

I do not know that hippopotamus were friends with humans and dogs

INTO JAPANESE

カバが人間や犬と友達だったことはわかりません

BACK INTO ENGLISH

I do not know that hippopotamus were friends with humans and dogs