高中英语It 的用法

1、.It 的用法1： it 做形式主语，不定式to do 或that 引导的句子做真正的主语例句: It is important for us to protect environment. 保护环境对我们来说是很重要的。it 做形式主语，真正的主语是to protect environment即 to protect environment is important for us 是本句，但这样显得头重脚轻，所以用it 做形式主语.例句: It is common knowledge that science and technology is the first productive fo

2、rce. it 做形式主语，that 引导的句子做真正的主语2：it 做形式宾语，不定式to do 或that 做真正的宾语例句：He thinks it very hard to master a foreign language.他认为掌握一门外语是很难的。he做主语，thinks 做谓语，it 做形式宾语，very hard 做宾补，to master a foreign language 做真正的宾语，即He thinks to master a foreign language very hard.例句：He thinks it very essential that he shou

3、ld have a decent job.他认为他应该有一份体面的工作是很必要的即He thinks that he should have a decent job very essential.3: it 用于强调句，其构造是it is was+强调部分+that 例句：It was his carelessness that caused his fatal failure.正是他的粗心导致了他的致命失败。强调his carelessness,做caused的主语,即强调主语例句：It was in the cinema that I came across my former Engl

4、ish teacher.在电影院我巧遇我的前任英语老师。 强调地点状语in the cinema 强调句去除it is 和that 这三个词仍然还是完好的句子4 It引导时间的三种句型1：It is +一段时间+since 从句从句用一般过去时例句：It is a decade since we became friends.自从我们成为朋友已经有十年了。2: it was +一段时间+before 从句从句用一般过去时例句：It was several weeks before he found that his precise painting was missing.过了好几周他才发现他

5、的珍贵画不见了。3 ： it will be +一段时间+before 从句从句用一般如今时例句：It will be a long time before China becomes a developed country.在中国成为兴隆国家之前将需过很长一段时间。语法单项选择1 It is his ability that _.A he has become a general manager B makes him become a general managerC why he can become a general manager D for which he becomes a

6、general manger2 _is very import for her _.A It , has complete her work in time B It , because she has to complete her work in timeC It , to complete her work in time D There , to complete her work in time3 I think _.A it is very crucial to save money B it very crucial saving moneyC it very crucial s

7、ave money D it very crucial to save money4 It was his courage _.A that made him stand out B that he stood out C why he stood out D helped him stand out 5 It _ten years _he became a teacher.A was , since B is, afterC is, before D is , since6 It _many hours _his mother arrives home.A will be ,before B

8、 is , beforeC was , since D will be , before7 It _two years _he found that he had caught the liver cancer.A was, before B was,sinceC has been ,when D is,before8 It was _that_.A because he spared no efforts to study ,made him become a top student.B because of his diligence that made him become a top

9、student.C his diligence ,he became a top studentD his diligence, made him become a top student.语法填空1 It is essential for students _keephealthy.2 I feel _very necessary for me to help her.3 It is only in this way _we can achieve the instant fame.4 I feel _very important _we keep practicing English ev

10、eryday.5 It _two days _the meeting ends.“师之概念，大体是从先秦时期的“师长、师傅、先生而来。其中“师傅更早那么意指春秋时国君的老师。?说文解字?中有注曰：“师教人以道者之称也。“师之含义，如今泛指从事教育工作或是传授知识技术也或是某方面有特长值得学习者。“老师的原意并非由“老而形容“师。“老在旧语义中也是一种尊称，隐喻年长且学识渊博者。“老“师连用最初见于?史记?，有“荀卿最为老师之说法。渐渐“老师之说也不再有年龄的限制，老少皆可适用。只是司马迁笔下的“老师当然不是今日意义上的“老师，其只是“老和“师的复合构词，所表达的含义多指对知识渊博者的一种尊称，

11、虽能从其身上学以“道，但其不一定是知识的传播者。今天看来，“老师的必要条件不光是拥有知识，更重于传播知识。6 It _two weeks _we knew each other7 It _a long time _we become successful actors.8 It _ five days _ we arrived in Macao.答案及解析单项选择1 B 【 解析】 强调句，因为it is his ability that 强调的是名词his ability ,只能做makes 的主语2 C 【解析】 it 放句首做形式主语，只能to do 或that 引导的句子做真正的主语3

12、 D 【解析】it 放think 后做形式宾语，后面to do 做真正的宾语4 A 【 解析】 强调句，强调主语5 D 【解析】it is +一段时间+since 从句6 D 【解析】it will +一段时间+before 从句从句用一般如今时态7 A 【解析】it was +一段时间+before 从句从句用一般过去时态8 D 【解析】强调句 his diligence 做made 的主语答案及解析语法填空1 to keep 【解析】it 放句首做形式主语，to do 做真正的主语2 it 【解析】it 放feel 后做形式宾语，to help her 做真正的宾语3 that 【解析】强

13、调句，强调部分only in this way 做方式状语4 it ,that 【解析】it 做feel 的形式宾语,后面是句子不是不定式观察内容的选择，我本着先静后动，由近及远的原那么，有目的、有方案的先安排与幼儿生活接近的，能理解的观察内容。随机观察也是不可少的，是相当有趣的，如蜻蜓、蚯蚓、毛毛虫等，孩子一边观察，一边提问，兴趣很浓。我提供的观察对象，注意形象逼真，色彩鲜明，大小适中，引导幼儿多角度多层面地进展观察，保证每个幼儿看得到，看得清。看得清才能说得正确。在观察过程中指导。我注意帮助幼儿学习正确的观察方法，即按顺序观察和抓住事物的不同特征重点观察，观察与说话相结合，在观察中积累词汇

14、，理解词汇，如一次我抓住时机，引导幼儿观察雷雨，雷雨前天空急剧变化，乌云密布，我问幼儿乌云是什么样子的，有的孩子说：乌云像大海的波浪。有的孩子说“乌云跑得飞快。我加以肯定说“这是乌云滚滚。当幼儿看到闪电时，我告诉他“这叫电光闪闪。接着幼儿听到雷声惊叫起来，我抓住时机说：“这就是雷声隆隆。一会儿下起了大雨，我问：“雨下得怎样?幼儿说大极了，我就舀一盆水往下一倒，作比较观察，让幼儿掌握“倾盆大雨这个词。雨后，我又带幼儿观察晴朗的天空，朗读自编的一首儿歌：“蓝天高，白云飘，鸟儿飞，树儿摇，太阳公公咪咪笑。这样抓住特征见景生情，幼儿不仅印象深化，对雷雨前后气象变化的词语学得快，记得牢，而且会应用。我还在观察的根底上，引导幼儿联想，让他们与以往学的词语、生活经历联络起来，在开展想象力中开展语言。如啄木鸟的嘴是长长的，尖尖的，硬硬的，像医生用的手术刀样，给大树开刀治病。通过联想，幼儿可以生动形象地描绘观察对象。5 will be ,before【解析】ends 是一般如今时，只合适it will be+一段时间+before 从句6 is ,since【解析】knew 是一般过去时态，根据意思，只合适it is +一段时间+since 从句7 will be ,before【解析】become 是一般如今时态，与当今“老师一称最