（高频词汇）be用法综述
在美国当代英语语料库统计的20000万个常用词中，be位列动词榜第一名，在4.5亿个单词中出现了12545825次。因为熟悉我们总以为掌握了它全部的用法，但是除了作系动词，这些用法你都知道吗？
频率最高的搭配：
be able>be likely>be available>be aware>be afraid
词形变化：
am,is,are; was,were；been
词义解析：
1.used to say something about a person, thing, or state, to show a permanent or temporary quality, state, job, etc.
（用来说明人、事物或状态，表示性质、状态、工作等）
He is rich. 他很富有。
It's cold today. 今天天冷。
That's all for now. 现在到此结束。
What do you want to be (= what job do you want to do) when you grow up? 你长大后想做什么？
These books are (= cost) $3 each. 这些书每本50便士。
[ + -ing verb ] The problem is deciding what to do. 问题在于要决定干什么。
[ + to infinitive ] The hardest part will be to find a replacement. 最困难的就是找代替者。
[ + that ] The general feeling is that she should be asked to leave. 大家普遍认为她应该被辞退。
It's not that I don't like her - it's just that we rarely agree on anything! 并不是我不喜欢她，只是我们看法很少相同！
2.[ usually + adv/prep ] used to show the position of a person or thing in space or time
（表示时间或方位）
The food was already on the table. 食品已经摆在桌上了。
Is anyone there? 那儿有人吗？
The meeting is now (= will happen) next Tuesday. 会议将于下周二召开。
There's a hair in my soup. 我的汤里有根头发。
3.used to show what something is made of
由…组成（或制成）
Is this plate pure gold? 这个盘子是纯金的吗？
词组搭配（按使用频率依次递减）：
1.to-be：in the near 未来的
a bride-to-be 待嫁的女子
mothers-to-be 准妈妈们
2.be-all：n.the be-all and end-all:the most important thing最重要的事；一切的一切
We all agreed that winning was not the be-all and end-all. 我们都同意，获胜并不是最重要的事情。
It was the period when everyone saw men in space as the be-all and end-all of space exploration. 那时候，人人都把载人上太空看作是太空探索最重要的事。
3.would-be:adj [ before noun ] 置于名词前；wanting or trying to be 想要做…的；试图成为…的；未来的
a would-be artist/politician 未来的艺术家／政治家
俚语（按使用频率依次递减）：
1. be murder ：（非正式场合）to be very difficult to do很困难
It's murder finding a parking space in town. 在城里很难找到停车位。
2. be all in：If you say that you are all in, you mean that you are very tired and unable to do anything more.筋疲力尽；疲乏到极点
I'm going home now - I'm all in. 我已经精疲力尽了，现在要回家了。
3.be all go ：If a situation or place is all go, it is extremely busy.忙得要命；事情特别多
It was all go in town today. 今天城里特别热闹。
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