为了帮助大家在考前对知识点有更深的掌握，精品学习网为大家整理了高二英语下学期期末备考知识点，希望对大家有所帮助。

7. Whatever great achievements the future may have in store for China, it is 1ikely that many of them will be born in northwestern Beijing. 无论中国将来会有什么样的伟大成就，其中许多很有可能会诞生在北京的西北部。(p.3 第一段1-2行)

1) be likely to do sth. 很可能(发生某种情况) Our team is likely to win the game. 这场比赛我们队很可能赢。

2) It is likely that + 从句 It is likely that we'll go on a picnic in the forest tomorrow. 很可能明天我们去森林里野餐。

辨析：likely，probable与possible:

* likely系常用词，指"从表面现象看很有可能"。

* possible指"由于有适当的条件和方法，某事可能发生或做到"，强调"客观上有可能"，但"实际希望很小"。

* probable语气比possible强，指"有根据、合情理、值得相信的事物，带有'大概'、'很可能'"的意思。

* likely之后常跟不定式 (be likely to do sth.)，而possible，probable之后通常不跟不定式;likely的主语可以是人，而possible，probable的主语不能是人。

The hurricane is likely to come. 飓风可能要来。/ It is possible to go to the moon now. 现在有可能登上月球。/ I don't think the story is probable. 我不认为这个故事合情合理。

联想：likely; friendly; fatherly; motherly; sisterly brotherly; manly; lovely; lively; lonely; orderly

8. Zhongguancun was set up as a special economic zone in the late 1990s and... 中关村是20世纪90年代末建成的经济特区... (p.3 第二段 第1-2行)

1) set up: (1) 竖立起来 Let's set up the tent first. 我们先把帐篷搭起来。(2) 建立，成立 Edison set up a chemical lab of his own at the age of ten. 爱迪生10岁就建立了他自己的化学实验室。(3) 使(自己或他人)从事某职业 (as) He has set himself up as a bookseller. 他开始经营书籍。

辨析：set off与set out

set off与set out这两个动词短语都有"出发"和"动身"的意思，都可以解释为start to move或begin a journey。

set off的原意是"使爆炸" (cause to explode);set out的原意是"着手做" (begin work with the intention of achieving a particular aim)。

注意：set out在用来表示"着手做"时，后面总是跟动词不定式。The slightest spark can set off the explosives stored here. 一点点火星就能够使储存在这里的火药爆炸。/ The journalist immediately set out to obtain these important facts, but he took a long time to send them. 那位新闻记者立即着手去获得这些重要的资料，但是他把这些资料寄来却用了很长时间。

拓展: set about着手(开始)做; set an example树立榜样; set apart留出，拔出; set fire to点燃，生火; set foot in (或on) 登上;涉足;访问

2) as用法小结

(1) as用作连词

① 作"当......的时候"解，引导时间状语从句，表示从句动作与主句动作同时发生、同时进行。As he looked at her she made a face. 他看她时，她作了个鬼脸。/ He sang as he walked. 他一边走，一边唱。

② 作"由于"、"因为"解，引导原因状语从句，表示比较明显的原因。由as引导的原因从句通常放在主句之前。As he didn't know much English，he got out his dictionary and looked up the word. 由于他不懂得多少英语，他拿出来词典查了这个词。

③ 作"如 (不如)......一样"解，引导方式状语从句或比较状语从句。He does not speak as the other people do. 他不像其他人那样肯说话。He is not so diligent as you. 他不如你勤奋。(so...as...只用于否定句。若为肯定句必须用as...as...)

④引导让步状语从句时，作"虽然"、"尽管" 解，这时，要将表语或状语提到主语之前，使句子部分倒装。如果表语是名词，放在句首时不能加冠词。Young as he is, he knows a lot. 尽管年轻，他懂得很多。Old man as he is, he still works hard. 尽管他是个老人，他仍然工作很努力。

(2) as用作代词

① 作关系代词，引导限制性定语从句，先行词前常有such，the same与之呼应，构成such...as，the same (...) as...。We'll make such computers as are needed in different branches of science. 我们将制造出科学的各部门所需要的那种计算机。/ I'm reading the same books as you. 我读的书与你读的书相同。

②引导非限制性定语从句，as常常作主语、定语、表语等，在这种情况下as指的是前面或后面的整个句子。The two cities are far away from each other, as you can see in the map. 正如你在地图上看见的那样，这两座城市相距甚远。/ As everybody knows, all that glitters is not gold. 大家都知道，闪光的东西不都是金子。

3) as if (as though) 用作连词，作"就像...似的""仿佛"解 (1) as if (as though)引起的方式状语从句或表语从句中动词一般用虚拟语气, be通常为were或was。如从句动作与主句动作同时发生，从句用一般过去时;若从句动作在主句动作之前发生，从句用过去完成时。Jane shouted in surprise as if she saw the land. 珍妮惊喊着，好像看见了陆地。/ Tom is talking about China as if he had been there. 汤姆正在谈着中国，好像他去过一样。

(2)若主句谓语动词为look，seem，taste，smell等词时，as if引导的表语从句常常使用陈述语气。 It looks as if it is going to rain. 看起来天好像耍下雨。/ This meat tastes as if it has already gone bad. 这肉尝起来好像已变坏了。

(3)当从句中主语和句子主语一致，从句谓语又包含动词be时，这个主语和be可以省略。He glanced about as if (he was) in search of something. 他四处打量着好像在搜寻什么。

(4) as if (as though)可以接一个不定式短语。He waved his hand to me as if to have something to tell me. 他向我挥了挥手好像有事要告诉我。

辨析：as，when与while

as，when，while作为连词，都有"当......的时候"的意思。* as常可与when或while通用，但它较强调主句和从句中的动作或事情同时发生。因此，常作"一面......一面......"解。 * while常表示一段较长的时间或一个过程，强调主句的动词和从句的动词所表示的动作或状态是同时发生的。用while引导的从句中用延续性动词。

As (When/While) I was walking down the street, l noticed a police car in front of Number 37. 我沿着大街往前走的时候，注意到37号门前停着一辆警车。/ When the clock struck twelve, all the lights went out. 钟敲12下时，灯全熄了。/ When I went into the lab, the professor was doing an experiment. 当我走进实验室时，那位教授正在做实验。/ Please keep quiet while others are studying. 别人在学习的时候，请保持安静。/ While I was writing letters last night, he was watching TV. 昨晚我在写信的时候，他在看电视。

误：As he is old, my teacher works hard.

正：Old as he is, my teacher works hard.

尽管我的老师年龄很大了，但是工作很努力。

误：So as to catch the early bus, he got up very early.

正：He got up very early so as to (in order to) catch the early bus. 他起早是为了赶早班车。

拓展：as a matter of fact实际上; as a result (of)结果; as far as就......而言;远至as follows如下as for至于，关于as long as只要; as well as还，也; as to至于，关于; as many as (表可数)和......一样多，达......之多

9. The science park is also home to a growing number of overseas Chinese who have grasped the opportunity to develop their ideas at home. 越来越多的海外华人抓住机会到国内来实现他们的理想。(p.3第三段第1行)

grasp的用法：(1) 抓住 v. grasp sb. by the arm 抓住某人的胳膊 (2) ([同]understand) 掌握，领会n. grasp sb.'s meaning 懂某人的意思 (3) n. [常用单数]紧握;把握;理解;理解力

辨析：grasp，grip，seize，snatch与grab

grasp抓紧 / grip紧握;比grasp更强 / seize抓紧;还有"夺过去强占"的含义 / snatch较突然迅速的"掠夺" / grab匆忙，以满有把握的动作抓住某事