例句：

　　How long does it take you to clean your house? 打掃屋子花費你多長(cháng)時(shí)間？

　　It takes me an hour to clean my house.打掃屋子花費我一個(gè)小時(shí)。

　　It's about an hour. 大概一個(gè)小時(shí)。