高中英語(yǔ) Unit 4 Global warming 第四學(xué)時(shí) Grammar課件 新人教版選修6.ppt

Unit 4 Global warming 第四學(xué)時(shí) Grammar,it的用法(),1it 在強(qiáng)調(diào)句中的用法,it 可用來(lái)對(duì)句子謂語(yǔ)以外的某一成分進(jìn)行強(qiáng)調(diào)，強(qiáng)調(diào)句的基本句型為：It動(dòng)詞be被強(qiáng)調(diào)部分who(m)/that其他部分。被強(qiáng)調(diào)部分指人，引導(dǎo)詞用who/that均可，被強(qiáng)調(diào)部分是人，并且在句中作賓語(yǔ)時(shí)，可用whom/who/that引導(dǎo)。強(qiáng)調(diào)其他部分，一律用that。被強(qiáng)調(diào)的部分是原句的主語(yǔ)時(shí)，who/that之后的謂語(yǔ)動(dòng)詞在人稱和數(shù)上與該主語(yǔ)一致。 (1)It was Jane who paid for the meal yesterday.(It was Jane and not another person.),昨天的飯錢(qián)是簡(jiǎn)付的。 (2)It was the meal that Jane paid for yesterday.(It was a meal and not something else.) 簡(jiǎn)昨天付的是飯錢(qián)。,2強(qiáng)調(diào)結(jié)構(gòu)和主語(yǔ)從句句型(Itbeadj./n.that其他部分)的區(qū)別 (1)強(qiáng)調(diào)結(jié)構(gòu)可以翻譯成“正是”或“就是”。 (2)含有主語(yǔ)從句的句子刪掉It be.that/who，則原句在結(jié)構(gòu)上和意義上均不成立，而強(qiáng)調(diào)結(jié)構(gòu)若去掉結(jié)構(gòu)標(biāo)志后，原句在結(jié)構(gòu)上和意義上仍然成立。 It is I that/who am your true friend. 我才是你真正的朋友。,(這是強(qiáng)調(diào)句，去掉It is.that/who后，句子仍然成立。) It is necessary that you should master at least one foreign language. 你有必要掌握至少一門(mén)外語(yǔ)。 (It作形式主語(yǔ)，代替后面由that引導(dǎo)的主語(yǔ)從句，去掉It is.that后，句子不能成立。),3強(qiáng)調(diào)句型和It動(dòng)詞一段時(shí)間before/when/that/since句型的區(qū)別 (1)強(qiáng)調(diào)句型：Itis/was被強(qiáng)調(diào)部分who(m)/that其他部分。 It was not until he came back that his mother went to bed. (2)It is時(shí)間段since 從句(一般過(guò)去時(shí)/過(guò)去完成時(shí))。,Its years since we enjoyed ourselves so much. 我們已有好多年沒(méi)有這么開(kāi)心過(guò)了。 (3)It was/will be時(shí)間段before 從句(一般過(guò)去時(shí)/一般現(xiàn)在時(shí))。 It was not long before he joined the Party. 不久，他就入了黨。 (4)It was時(shí)間點(diǎn)when從句(一般過(guò)去時(shí))。 It was 12 oclock when he came back to school.,(這不是強(qiáng)調(diào)句。it指時(shí)間， when引導(dǎo)時(shí)間狀語(yǔ)從句。) 比較：It was at 12 oclock that he came back to school. (這是強(qiáng)調(diào)句，強(qiáng)調(diào)時(shí)間狀語(yǔ)at 12 oclock，去掉It was.that，句子仍然成立。),4對(duì)于特殊疑問(wèn)句強(qiáng)調(diào)的句式是“疑問(wèn)詞is/wasitthat其他部分” What is it that Rosa has found in the living room? 露莎在起居室里發(fā)現(xiàn)的是什么？ I dont know what it is that Jimmy has done in his study. 我不知道吉米在書(shū)房里干什么。,Do you still remember where it was that you first came across Paul three years ago? 你還記得三年前是在哪兒第一次見(jiàn)到保羅的嗎？,