高中英语人教版必修二-Unit3-课文内容必修二Unit3 课文内容1.I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage.本句是由并列连词and连接的并列句。
and后的句子中before引导时间状语从句。
△before引导时间状语从句before引导时间状语从句时可以根据语境译作“过了……（时间）才……”，“还没来得及……就……”或“在……之前”。
They walked about 30 miles before they saw a village.We hadn’t run a mile before he felt tired.△before常用于以下句型中：⑴It was + 时间段+ before... “过了……才……”，从句常用一般过去时。
⑵It was not long before ... “不久就……”，从句常用一般过去时。
⑶It will not be long before... “不久就会……”，从句常用一般现在时。
⑷It will be + 时间段+ before... “要过……才……”，从句常用一般现在时。
It was five days before he came back.It was not long before he sensed the danger of the position.It will not be long before they understand each other.It will be half a year before you graduate from the school.练习：1. It was evening ______ we reached the little town of Winchester.A. thatB. untilC. sinceD. before2. Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.A. sinceB. afterC. beforeD. when3. Someone called me up in the middle of the night, but they hung up ______ I could answer the phone.A. asB. sinceC. untilD. before4. He made a mistake, but then he corrected the situation ______ it got worse.A. untilB. whenC. beforeD. as5. It was some time _____ we realized the truth.A. whenB. untilC. sinceD. before6. The American Civil War lasted four years _____ the North won in the end.A. afterB. beforeC. whenD. then7. –Why didn’t you tell him about the meeting?–He rushed out of the room _____ I could say a word.A. beforeB. untilC. whenD. after8. –How long do you think it will be______ China sends a manned spaceship to the moon? –Perhaps two or three years.A. whenB. untilC. thatD. before2.Anyhow, my goal is to provide humans with a life of high quality.本句为简单句。
my goal为主语；动词不定式短语to provide...为表语；of high quality作定语，修饰a life.△“of + 名词”结构“of + 名词”结构可在句中作表语、定语和补语。
该结构可分为两类：⑴名词有相应的形容词时，“of + 名词”可转化为相应的形容词。
这类名词有value, use, important, help, interest, benefit等。
它们可用no, some, any, little, much, great等词修饰。
They are of great help ( = very helpful) to English learners.In fact, sports can be of great benefit (=very beneficial) to our health.⑵名次没有相应的形容词时，“of + 名词”没有相应的形容词形式。
常见的名词有age, size, color, weight, quality, height, price, opinion, shape, kind, way等，这些名词前的限定词常为a, an, the same等。
Mr. Smith, my teacher, is of the same opinion.We are of the same age.Tom is of a different way of thinking.练习：⑴–This book by Tony Garrision is ______ for our course.– But I think his latest one is better worth reading.A. uselessB. of no useC. of great useD. great useful⑵完成句子①这项工程对每个人都大有好处。
This project is ______________________________ (benefit) to everyone.②同时，性别差异的主题也很有趣。
Also, the topic of sex differences is ____________________________ (interest).③在这个地区，我们学校的教学质量是最好的。
Our school education is ________________________ (quality) in this area.3.As time sent by I did research into how to make my radio.本句中as time sent by为as引导的时间状语从句，how to make my radio作介词into的宾语。
△as引导的时间状语从句⑴as引导时间状语从句，意为“随着，当……”，强调主从句的谓语动作同时发生。
As shots rang, people could be seen running out of the building.⑵as引导比较状语从句，意为“像……一样”。
He is as old as I (am).⑶as引导方式状语从句，意为“照……的方式”。
When in Rome, do as the Romans do.⑷as引导原因状语，意为“因为，由于”。
”As she has no car, she can’t get there easily.⑸as引导让步状语从句，意为“尽管，虽然”，此时从句需用部分倒装结构。
Happy as/though they were, there was something missing.Child as/though he is, he knows a lot.练习：⑴Stupid ______ it sounds, I was so in love with her that I believed her.A. althoughB. asC. whileD. when⑵Lessons can be learned to face the future, _______ history cannot be changed.A. thoughB. asC. sinceD. unless⑶完成句子①我们最好快一点，因为天就要黑了。
We had better hurry, _______________________________________ __.②尽管她已经很累了，但她想睡觉是没有指望的。
___________________________________, there was no hope of her being able to sleep. ③详细的调查显示多达50%的病人没有遵照指示服药。
Careful surveys have indicated that as many as 50% of patients do not takedrugs ____________________________.(direct)4.She programs us with all the possible moves she has seen while watching human games.本句为主从复合句。
she has seen while watching human games是省略了关系代词that的定语从句，修饰先行词moves；该定语从句中的while watching human games为时间状语从句的省略形式，完整形式应为while she was watching human games.△状语从句的省略省略现象一般出现在下列五种状语从句中：①由when, while, as, before, after, till, until, once等引导的时间状语从句；②由whether, if, unless等引导的条件状语从句；③由though, although, even if, whatever等引导的让步状语从句；④由as, than等引导的比较状语从句；⑤由as, as if, as though等引导的方式状语从句。