YOU SAID:

i thinkn yo u are dumb

INTO JAPANESE

あなたは馬鹿だと思う

BACK INTO ENGLISH

I think you are a fool

INTO JAPANESE

私はあなたがばかだと思う

BACK INTO ENGLISH

I think you are an idiot

INTO JAPANESE

私はあなたがばかだと思います

BACK INTO ENGLISH

I think you are an idiot