高考英语专题总复习it用法及强调句型一、it作指示代词 【完成句子】用one，ones，it，that，those, the one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 shelf are easier than _ on the second shelf. (5) The boy told his story and _ of the girl upstairs. it oneone ones thatthose the one【结论1】指代上文提过的事物时，it指的是同类同 物，one指的是同类异物，复数形式用ones；that后面常有后置定语，有特指意义，代替 不可数名词或单数可数名词复数名词用those，相当于the ones。 【例句观察】 Someone is knocking at the door. Who is it? It must be Leo. He said hed come to see me. 【结论2】it指代人时，常指小孩或身份不明的人。【例句观察】Its too quiet in the room. Everyone just keeps silent. 【结论3】it可用以指代环境或情况。【完成例句】 根据语境补全句子(6) What time is it now? half past seven. (7) spring now and its warm these days. 【结论4】 it可用以指代时间、季节、天气或距离。Its Its【注意】 it指代时间时，有如下一些句型：(1) It is time for sth. (for sb.)to do sth. that从句(should do / did ）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) It is / has been some time since从句 (一般过去时)(3) It / This is the first / secondtime that从 句(现在完成时)It / That was the first / secondtime that 从句(过去完成时)这是某人第次做了某事例：It is the second time that she has visited the Great Wall. That was the first time that I had come late to school. (4) It was 时间点 when 从句例： It was evening when we got home. (5) It was / will be some time before 从句 例：过了5年他们才从北大毕业。It was five years before they finally graduated from Beijing University. 不久，我们就要从我们学校毕业了。It wont be long before we graduate from our school. 二、it作形式主语【完成例句】根据语境补全句子(8) is possible for me to make a tour around the world. 【结论】代替由不定式、动名词或从句所表示 的真正主语。为平衡句子，通常把不定式作主 语改为it 作形式主语。 It三、it作形式宾语【例句观察】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 have made it a rule to get up early.【结论1】it可以用在某些固定句型中，例如：How did it come about that从句意为 “怎么发生的？”it 作形式宾语常用结构有：代替由不定式、动名词或从句所表示的真正宾语。常见 结构有： 主语 think / consider / find / feel / make / believe / regard itadj. / n. (for sb.)to do. 【例句观察】 I consider it no good chatting with strangers through the Internet. 【结论2】主语 think / consider / find / feel it no good / use doing sth. 【例句观察】I hate it when people speak with their mouths full. 【结论3】主语hate / dislike / love / like it when从句，表示对某一情况的喜好或厌恶。【例句观察】I really appreciate it if you could help me with my math. 【结论4】主语appreciate it if从句【例句观察】 You must see to it that the 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. 【结论5】主语see to / answer for it that 从句(确保)主语depend on it that从句(指望，确 信)四、带it的一些固定词组1(Youve / Ive) got it. 2. Forget it. 3. take it easy4. make it5. make it 时间 6. It / That (all) depends. 。7. It cant be helped. 8. It is hard to say. 9. Thats it. 10.Dont mention it. 11. Believe it or not. 12. It doesnt matter. 13. When it comes to 14. Keep it up. 强调句型强调句结构：It is / was 被强调部分that 句子的其余部分。验证强调句的方法： 去掉It is / wasthat 结构后，可以把被强调的部分与句子其余部分还原 为一个完整的句子。【例句观察】(1) It was Edison who invented the lamp. (2) It is Edison who invents the lamp. 【结论1】注意时态的一致性。【例句观察】It is I that am your English teacher. 【结论2】当被强调的部分是主语时，注意保持主谓一致。【例句观察】He didnt go to bed until he finished his homework. (对画线部分进行强调) It wasnt until he finished his homework that he went to bed. 【结论3】not until 结构用于强调句 中，即：It wasnt until that 句子的其余部分。【例句观察】Was it not until he finished his homework that he went to bed? 【结论4】强调句的一般疑问句形式：Is / Was it 被强调部分 that句子的其余部分。【完成句子】他究竟什么时候上床睡觉？When was it that he went to bed? 【结论5】强调句的特殊疑问句形式：特殊 疑问词 is / was it that 句子的其余部分。【例句观察】I really dont know when it was that he went to bed. 【结论6】含有强调句型的特殊疑问句作宾语从句时，注意用陈述语序。【疑难】 It is in the city where he was born that he works. 他工作的地方是他出生的那个城市。 【疑难剖析】强调句中的被强调部分含有 一个定语从句，要注意区别、分析。It is / was 被强调部分定语从句 that (who)句子的其余部分1. We feel our duty to make our country a better place。Ait Bthis Cthat Done 2. He didnt make _ clear when and where the meeting would be hold.Athis Bit Cthat Dthese 3. Was _ in the hotel _ you lost your bag?Aone,that Bthat, one Cthat, it Dit,that