九年级英语第五单元重要知识点.doc

1、九年级英语Unit5现在完成时态由have/ has 过去分词表示过去发生或已经完成的某一动作对现在造成的影响或结果常与already, just , yet , ever, never 连用Have you finished your work yet？你完成了你的工作了吗？Yes, I have. I have just finished it.是的。我刚刚完成了。I have already finished it .我已经完成了。Have you ever been to China?你曾经去过中国吗？No, I have never been there.没有，我从来也没有去过。表示

2、过去已经开始，持续到现在的动作或状态和表示过去某一时刻延续到现在（包括现在在内）的一段时间的状态连用如：（for + 时间段，since + 时间点，或过去某一动作， 以及how long ）注： 非延续性动词在现在完成 时态中不能和for, since 引导的表示一段时间的状语的肯定句连用。应转为相应的延续性动词 如：buy- have die- be dead join - be in borrow- keep leave- be away I have bought a pen.- I have had a pen for 2 weeks.The dog has died.- The d

3、og has been dead since last week.have (has) been to + 地点 去过某地 已经回来have (has) gone to + 地点 去了某地 没有回来have been in + 地点 一直呆在某地 没有离开过 如：She has been to Shanghai. 她去过上海。(已经回来)She has gone to Shanghai. 她去了上海。(没有回来)She has been in Shanghai for 2 days.她呆上海两天了。(没有离开过上海)1.情态动词must, may , might, could, may , c

4、ant表示推测含义与用法后面都接动词原形，都可以表示对现在情况的揣测和推断但他们 含义有所不同 must 一定 肯定 (100%的可能性) may, might, could有可能，也许 (20%80%的可能性) cant 不可能，不会 (可能性几乎为零) The dictionary must be mine. It has my name on it. The CD might/could/may belong to Tony because he likes listening to pop music. The hair band cant be Bobs. After all, he

5、 is boy!2. whose 谁的疑问词作定语后面接名词如：Whose book is this? This is Lilys.3. belong to 属于如： That English book belongs to me.4. 当play 指弹奏乐器时，常在乐器前用定冠词如：play the guitar play the piano play the violin当play 指进行球类运动时，则不用定冠词如： play football play basketball play baseball5. if引导的条件状语从句，主句用一般将来时，从句用一般现在时代替将来时如：If yo

6、u dont hurry up, youll be late.如果你不快点，你将会迟到6. if you have any idea= if you know 如果你知道7. on关于（学术，科目）8. try to do sth. 尝试做某事如：I try to climb the tree. 我尝试爬树。9. because of , because because of + 名词/代词/名词性短语 because +从句如：I do it because I like it. 我做这件事是因为我喜欢。 I had to move because of my job. 因为工作的原因我得搬

7、家。10. own v.owner n. listen v.listener n. learn v.learner n.11. catch a bus 赶公车12. neighbor 邻居指人 neighborhood 邻居指地区也可指附近地区的人13. local 当地的如：local teacher 当地的教师14. noise n. 噪音是个可数名词noises 15. call the police 报警如：Quick! Call the police! 快！叫警察！16. anything strange 一些奇怪的东西当形容词修饰something, anything, nothi

8、ng, everything等不定代词时，放在这些词的后面17. there be sb./ sth. doing 如：There is a cat eating fish. There must be something visiting our home.18. escape from 从哪里逃跑出来如： He escaped from the burning building. 他从燃烧的大概中逃出来。19. an ocean of + 名词极多的，用不尽的如：an ocean of energy.20. unhappy 不高兴的反义词 happy 高兴的 21. final adj.

9、最后的finally adv. 最后地22. dishonest 不诚实的反义词 honest 诚实的。23. get on 上车 get off 下车24. use up 用光、用完如：They have used up all the money. 他们已经用完了所有的钱。25. attempt to do 试图如：The boys attempted to leave for Beijing. 男孩子们试图想去北京。26. wake 动词唤醒常用的词组：wake up意为醒来如：Please wake me up at 8 oclock.请在8点钟叫醒我。27. look for 寻找指

10、过程find 找指结果如：I am looking for a pen. 我正在找一支笔。（指找的过程）I found my pen just now. 我刚刚找到了我的笔。（指找的结果）28. hear 听指听的结果listen 听 指听的过程如：Did you hear ? 你听到了吗？（指听的结果，听或没听到）I often listen to the music. 我经常听音乐。（指听的过程）29. try ones best to do sth. 尽某人的最大努力去做某事如：He tried his best to run. 他尽他的最大努力去跑。30. 名词所有格名词所有格的构成有两种形式是在名词后面加 s 或是以s结尾 的名词，只在名词的后面加 如：Anns book安的书, our teachers office我们老师们的办公室 注：双方共有的所有格，只在后面一个名词加s,如：Lily and Lucys father 莉莉和露西的爸爸（她们的爸爸是同一个人）有of 介词短语表示无生命东西的所有格如： a picture of my family 我家人的相片有时也有s表示无生命的东西的所有格如：todays newspaper,the citys name