No pain,no gains,這是一句格言,它沒有什麼語法錯誤。有一些格言他是約定俗成的表達,所以呢,不用考慮他的語法結構。比如有志者事竟成,where there is a will there is a way。嗯,不自尋煩惱,don't trouble troubles until trouble troubles you。小菜一碟,a piece of cake。