YOU SAID:

You have very crusty knees

INTO JAPANESE

非常に無愛想な膝があります。

BACK INTO ENGLISH

Knees very unfriendly.

INTO JAPANESE

膝は非常に無愛想。

BACK INTO ENGLISH

Knees were very unfriendly.

INTO JAPANESE

膝は非常にフレンドリーでした。

BACK INTO ENGLISH

The knee was very friendly.

INTO JAPANESE

膝が非常によかったです。

BACK INTO ENGLISH

Knees are very good.

INTO JAPANESE

膝が非常に良いです。

BACK INTO ENGLISH

Knees are very good.