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1、第13講 it的用法及強調句型it的用法一、it作指示代詞【完成句子】用one，ones，it，that，those填空(1) I cant find my watch. You havent found _？ If you want to buy a new _， I suggest you buy _ made in China.(2) Weve got a big cup and two small _.(3) The weight of an elephant is much greater than _ of a tiger.(4) The books on the first sh

2、elf are easier than _ on the second shelf.(5) The boy told his story and _ of the girl upstairs.【答案】(1) it; one; one (2) ones (3) that(4) those / the ones (5) that / the one【結論1】指代上文提過的事物時，it指的是同名同物，相當于the名詞；one指的是同名異物，表示單數(shù)可數(shù)名詞相當于a 名詞；a / an形容詞one等于a / an形容詞名詞；復數(shù)形式用ones；that后面常有后置定語，有特指意義，代替不可數(shù)名詞或單數(shù)

3、可數(shù)名詞，相當于the名詞；復數(shù)名詞用those，相當于the ones。【例句觀察】 Someone is knocking at the door. Who is it? It must be Leo. He said hed come to see me.【結論2】it指代人時，常指小孩或身份不明的人。【例句觀察】Its too quiet in the room. Everyone just keeps silent.【結論2】it可用以指代環(huán)境或情況?！就瓿衫洹扛鶕?jù)語境補全句子(6) What time is it now? Its half past seven.(7) It i

4、s spring now and its warm these days.【結論4】 it可用以指代時間、季節(jié)、天氣或距離。【注意】 it指代時間時，有如下一些句型：(1) It is time for sth. (for sb.)to do sth. / that從句(should do / did, 必須用虛擬語氣)例： Its time for lunch. Its time for us to clean the house. Its time that we should clean the house.Its time that we cleaned the house.(2) I

5、t is / has been some time since從句 (從句用一般過去時)(3) It / This is the first / secondtime that從句(必須使用現(xiàn)在完成時)這是某人第次做了某事。It / That was the first / secondtime that從句(必須使用過去完成時)例：It is the second time that she has visited the Great Wall. This was the first time that I had come late to school.(4) It was 時間點 whe

6、n 從句例： It was evening when we got home. It was evening in which we got home.(5) It was / will be some time before 從句例：過了5年他們才從北大畢業(yè)。It was five years before they finally graduated from Beijing University.不久，我們就要從我們學校畢業(yè)了。It wont be long before we graduate from our school.二、it作形式主語【完成例句】根據(jù)語境補全句子(8) It

7、is possible for me to make a tour around the world.【結論】代替由不定式、動名詞或從句所表示的真正主語。為平衡句子，通常把不定式作主語改為it 作形式主語。三、it作形式賓語【例句觀察】How did it come about that so many people were attacked? She feels it hard to get in touch with her old friend. Mobile phones make it possible for us to keep in touch anywhere. I hav

8、e made it a rule to get up early.【結論1】it可以用在某些固定句型中，例如：How did it come about that從句意為“怎么發(fā)生的？”it 作形式賓語常用結構有：代替由不定式、動名詞或從句所表示的真正賓語。常見結構有：主語 think / consider / find / feel / make / believe / regard itadj. / n. (for sb.)to do.【例句觀察】I consider it no good chatting with strangers through the Internet.【結論2】

9、主語 think / consider / find / feel it no good / use doing sth.【例句觀察】I hate it when people speak with their mouths full.【結論3】主語hate / dislike / love / like it when從句，表示對某一情況的喜好或厭惡?！纠溆^察】I really appreciate it if you could help me with my math.【結論4】主語appreciate it if從句【例句觀察】You must see to it that the

10、doors are locked before you leave the lab.You can depend upon it that we wont give up.I answer for it that she is an honest girl.【結論5】主語see to / answer for it that從句(確保)主語depend on it that從句(指望，確信)四、帶it的一些固定詞組1(Youve / Ive) got it. 懂了，明白了2. Forget it. 算了吧，別在意，沒關系。3. take it easy 別著急，慢慢來；別過于緊張4. make

11、 it 辦得到，做成功5. make it 時間把定在(某時)6. It / That (all) depends. 那要看情況而定。7. It cant be helped. 沒有辦法。 / 這是不可避免的。8. It is hard to say. 情況很難說。9. It comes to nothing. 沒有什么結果。10. Dont mention it. 不用謝。11. Thats it. 對了；正是。12. catch it(口語)被責罵； 受處罰13. Believe it or not. 信不信由你。14. It doesnt matter. 沒有關系； 不要緊；15. Wh

12、en it comes to當談到； 當涉及16. Keep it up. 再接再厲。強調句型一、強調句型的基本用法1強調句結構：It is / was 被強調部分that 句子的其余部分。2句型解讀：(1) it是引導詞，強調的內容可以是句子的主語、賓語、狀語。如果被強調的部分是人，that 可用who代替，其他情況一律用that。(2) 驗證強調句的方法： 去掉It is / wasthat 結構后，可以把被強調的部分與句子其余部分還原為一個完整的句子。二、強調句型的考點【例句觀察】(1) It was Edison who invented the lamp.(2) It is Edis

13、on who invents the lamp.【結論1】注意時態(tài)的一致性。原句中用的是過去的某種時態(tài)， 用it wasthat；原句中用的是現(xiàn)在或將來的某種時態(tài)，用it isthat【例句觀察】It is I that am your English teacher.【結論2】當被強調的部分是主語時，注意保持主謂一致?！纠溆^察】He didnt go to bed until he finished his homework. (對畫線部分進行強調) It wasnt until he finished his homework that he went to bed. (強調句)【結論3

14、】not until 結構用于強調句中，not 要提前到until之前，放在be動詞后。即：It wasnt until that 句子的其余部分?！纠溆^察】Was it not until he finished his homework that he went to bed?【結論4】強調句的一般疑問句形式：Is / Was it 被強調部分 that句子的其余部分?！就瓿删渥印縒hen was it that he went to bed?【結論5】強調句的特殊疑問句形式：特殊疑問詞 is / was it that 句子的其余部分。【例句觀察】I really dont know when it was that he went to bed.【結論6】含有強調句型的特殊疑問句作賓語從句時，注意用陳述語序?！疽呻y】It is in the city where he was born that he works.他工作的地方是他出生的那個城市?！疽呻y剖析】強調句中的被強調部分含有一個定語從句，要注意區(qū)別、分析。It is / was 被強調部分定語從句that (who)句子的其余部分