十月9日英语课件.pptVIP

;要点解读;能力解读;基本概念和用法 ;具体用法 作代词: 1. 指代事物或前面提到过的事物:;Yeah. I won’t forget it!;2. 指与某事有关的人或事;3. 指代时间和天气;It is twenty past two.;4. 指代距离;5. 表示情况或代替this, that:;; (3)it表示时间、天气、距离等。 --What time is it now? --Its half past three. It is hot and sunny. Its about ten kilometers from the park to the museum. ;二.用作先行代词: it作形式主语: 英语中不定式、动名词、主语从句在作主语时主语往往显得很长，使整个句子看上去有点 头重脚轻，这样就借助“it”来作形式上的主语，而把真正的主语移到句子后边去，使全句看上去平稳一些。 “it”没有实际的意义。 ;It + predicate (be) + adj. // n. +to do It is easy to climb the hill. It is his duty to settle the problem. 2) It +predicate (be) + no use / good + gerund (动名词) It is no using arguing with him. It is no good going there. ;2.作形式宾语: 这种情况通常只用于能带以名词或形容词作宾语补语的动词后面。常用于下列句型: feel; think; make; find…+it + adj. // n. +to do … Eg. I found it not easy to get on with Jim. ;We all think it vital to English well. Mr. Li has made it very clear that no one is allowed to go swimming alone after class. I leave it to you to judge by yourself. ;三. 作为强调句的引导词: 为了强调句子的某一成分，把引导词“it”用在句首，这种强调句的结构是 “It is （was ）＋所强调的成分（主语、宾语、状语）＋that…”， 表达的意思为“是…，正是…，就是…”。 “it ”在这种句型中本身没什么实际意义。这里需要说明的是：如被强调的是人，则后面用who或that， 如被强调的是物或其他情况，则用that。 ;Peter swept the floor yesterday. (改为强调句) It was Peter who // that swept the floor yesterday.(主) It was yesterday that Peter swept the floor.(时间状语) It was the floor that Peter swept yesterday.(宾语);****注意点: 使用强调句应该注意的问题有下面几点: 无论被强调部分是什么,总是用that (强调指人的主语时,who // that两者皆可用;如果被强调部分是指物只用that, ) It was they who // that built the house last year. 2) 强调主语时,谓语动词必须和原有的主语保持人称数的一致: It is he who is going to go abroad. It is I who am to blame. ; 3) 区别词句与定语从句的异同: It was in the factory that my father used to work.(强调) It was the factory where my father used to work. (定语从句);四. It 特殊句型: 1.It + be +一段时间 + since… 1）主句为It is ( has been) +时段时 , since从句通常用一般过去时；主句为It was ( had been) +, since从句一般为过去完成时。 2）当since从句中为延续动词时，表示从该动作结束时算起有多久。 ;自从我上次见到他已经有两年了。 It is two years since I last