YOU SAID:
How is your sister? She didn't look good the other day.
INTO JAPANESE
あなたの姉妹は元気ですか?先日彼女の様子が良くなかった。
BACK INTO ENGLISH
How is your sister? She wasn't feeling well the other day.
INTO JAPANESE
あなたの姉妹は元気ですか?先日彼女は体調が優れませんでした。
BACK INTO ENGLISH
How is your sister? She wasn't feeling well the other day.
That didn't even make that much sense in English.