单词：be back
音标：[bi: bæk] ；
回来，放回; 拖欠
be back的用法和样例：
例句
- His parents demanded that he (should) be back by ten.他的父母要求他十点以前回家。
- Could you give me a rough idea when you'll be back?你能告诉我你大概什么时候回来吗？
- I won't be back till 11:00.我11点以前回不来。
- I'll be back soon.我马上回来。
- She longed to be back in China.她渴望回到中国。
- You must be back by four o'clock.你务必在4点前回来。
- I'll be back in an instant.我马上就回来。
- It is expected that John will be back by ten.约翰在十点以前回来是预料中的事。