21 be afraid to do (of sth. 恐惧，害怕……eg: I\'m afraed to go out at night. I\'m afraid of dog.
　　　　
　　22 be allowed to do 被允许做什么 eg: I\'m allowed to watch TV. 我被允许看电视。I should be allowed to watch TV. 我应该被允许看电视。
　　　　
　　23 be angry with sb. 生某人的气 eg: Don\'t be angry with me.
　　　　
　　24 be angry with (at) sb. for doing sth. 为什么而生某人的气
　　　　
　　25 be as … 原级 … as 和什么一样 eg: She is as tall as me. 她和我一样高。
　　　　
　　26 be ashamed to
　　　　
　　27 be away from 远离

　　28 be away from 从……离开
　　　　
　　29 be bad for 对什么有害eg: Reading books in the sun is bad for your eyes. 在太阳下看书对你的眼睛不好。
　　　　
　　30 be born 出生于
　　　　
　　31 be busy doing sth. 忙于做什么事 be busy with sth. 忙于……
　　　　
　　32 be careful 当心;小心 be close to … 离……很近
　　　　
　　33 be different from … 和……不一样
　　　　
　　34 be famous for 以……著名
　　　　
　　35 be friendly to sb 对某人友好
　　　　
　　36 be from = come from 来自eg：He is from Bejing. He comes from Bejing.Is he from Bejing? Does he come from Bejing?
　　　　
　　37 be full of 装满……的 be filled with 充满eg: the glass is full of water the glass is filled with water
　　　　
　　38 be glad + to do/从句 做某事很高兴
　　　　
　　39 be going to + v.(原) 打算，计划，准备……
　　　　
　　40 be good at(+ doing) = do well in 在某方面善长, 善于……