YOU SAID:
Dont you think you are working in wain
INTO JAPANESE
あなたは無駄に働いているとは思わない
BACK INTO ENGLISH
I do not think that you are working in vain
INTO JAPANESE
あなたが無駄に働いているとは思わない
BACK INTO ENGLISH
I do not think that you are working in vain
You've done this before, haven't you.