《it用法总结》PPT课件.ppt

The use of “it“ it 的 用 法,5/31/2019,Discovering “It”,It rains heavily. 2. It is 20 kilometers from Granddads house to James. 3. It is November 11, 2005. 4. It is 9 oclock at night. 5.Itll be lovely in the garden tonight 6. It is bad to smoke. 7. It is likely that he will succeed.,天气,距离,日期,时间,形式主语,环境,形式主语,内容提要,it作人称代词,代替前面提到的事物. it 作指示代词,指代this/that 3. it作非人称代词，指代时间,日期，温度，季节, 距离，金钱，天气，环境等 4. it作形式主语. 当动名词,不定式,从句作主语时, 常用it作形式主语. 5. it作形式宾语,常用在6123结构中. (think , find, make, believe, ) 6. It is that/who.的强调句型.,1 . 用作人称代词,代替前文提到的事物，或指代性别不详的人,My pen is missing. I cannot find it anywhere. Her new baby is tiny. It only weighs 2 kg.,一. 代词it,2. 作为指示代词,相当于this 或 that，it有时不特指某件东西，而代表前面已提到的或将会发生的某件事情。 I had a talk with the students. It was very helpful to her,3.作为非人称主语,可用来指代时间、距离、自然现象（天气、气候、气温）、环境等，通常不翻译出来。 It is two oclock now. It is Sunday today. It is summer. It is not far to the post office. It is getting hot. It will be a fine day tomorrow. It is quiet in the classroom.,Eg: I bought a dictionary three years ago and I am still using_ now. I bought a dictionary three years ago but I am going to buy a new _soon.,It用以指特定的前面提到过的事物，即：it和它替换的是同一个事物，it前无修饰语；而one用于替换与前提事物有共同之处但并不完全一样的事物，因此，one之前或之后一定有修饰语来加以区别。,It和one,it,one,1. Toms mother kept telling him that he should work harder , but _ didnt help . A. he B. which C. she D. it,2. European football is played in 80 countries , making _ the most popular sport in the world . which B. this C. that D. it 3.-There is a copy of the book in the library. Will you go and buy _? -No,Id rather buy_in the bookstore. A.it;one B.one;one C.one;it D.it;it,D,D,A,二.引导词 it,1.it 作形式主语 当主语由动词不定式短语，动名词短语和主语从句充当时，为了避免头重脚轻，使整个句子平衡，常把 这些主语放在句末，而把it放在句首充当形式主语。如： It is necessary for you to get up early. It is no use arguing with him. It is a fact that English is being accepted as an international language.,作形式主语,代替不定式,动名词或从句表示的真正主语,代替不定式 1) It be +adj.+of sb. to do It be +adj./ n.+for sb. to do .当形容词表示的是不定式逻辑主语sb.的性质的时候，用of，可以改写为：sb. is kind to do sth. 其他的形容词用for。 It is important for us to learn English. It is a pity for you to miss the concert. It is kind of you to help me You are kind to help me.,2. 代替动名词 It be +adj./ n.+doing. 当形容词或名词为 useless, no use, no good时,后面必须跟动名词. It is no use arguing with him. 3.代替从句 主语从句通常不放在句首，一般把它移到句子后面，前面用“it”作形式主语。 It is strange that he didnt come yesterday. It is not known yet whether they will return today.,1._worries me the way he keeps changing his mind. (2007山东) A. This B.That C.What D. It 2. _excited us Chinese greatly that Liu Xiang broke the world record of the 110-meter hurdle race. A.What B.That C. It D. As,D,C,当复合宾语中的宾语是不定式、动名词、宾语从句时, 往往把宾语放在它的补足语后面, 而用it 作形式宾语, 放在宾语补足语之前。,e.g. I think it no use arguing with him. 我认为和他争吵没有用。,2. 作形式宾语,该句型中的it 作形式宾语。为了记忆方便我们可称该句型为： 6123结构 6 指主句中常用的动词：think, believe, make, find, consider, feel ； 1 指的是形式宾语it ； 2 指的是宾补的两种形式：形容词或名词 ； 3 指的是真正宾语的三种形式：不定式短语，动名词短语或that 引导的宾语从句。 We think it our duty to clean our classroom. He felt it important learning English well. They found it difficult that they would finish their work in two days.,1.He didnt make_clear when and where the meeting would be held.(2007.天津) A.this B.that C.it D.there 2.I dont think_possible to master a foreign language without much memory work. A.this B.one C.its D.it,C,D,3.用于强调句中,1. It is + 被强调部分 + that/who +句子剩余部分 该句型是强调句型。将被强调的部分 放在前面，其它部分置于that 之后。被强调 部分可以是主语，宾语，表语或状语。强调的 主语如果是人，that 可以由 who 换用。如果把 这种句型结构划掉后，应该是一个完整无缺 的句子。这也是判断强调句型与其它从句的方法。,I planted trees at the gate this morning. It was I that/who planted trees at the gate this morning. It was trees that I planted at the gate this morning. It was at the gate that I planted trees this morning. It was this morning that I planted trees at the gate.,2. It is not until + 被强调部分 + that . 该句型也是强调句型。主要用于强凋时间状语，译成汉语 “直到才”，可以说是 not . until . 的强调形式。 I did not realize she was a famous film star until she took off her glasses. = It was not until she took off her dark glasses that I realized she was a famous film star.,It was about 600 years ago _ the first clock was made Athat Buntil Cbefore Dwhen 2.Was _ that I saw last night at the concert? A. it you B. not you C. you D. that yourself,A,A,3. It was only when I read his poems again _I began to appreciate their beauty Auntil Bthat Cthen Dso 4. It was not until 1920 _ regular broadcasts began. A. while B. which C. that D. since,B,c,5/31/2019,六、It 常用的固定搭配,make it （1）在口语当中相当于succeed，表示：成功、做到、说定、赶上、及时到达 例 Its hard to make it to the top in show business. （2）在口语中相当于fix the date for，表示“约定好时间”例 Shall we meet next week？ OK. We just make it next Saturday.,5/31/2019,2. take it/things easy 相当于Dont worry or dont hurry. 用来劝告别人，表示“不要慌，别担心，沉住气” Take it easy！ He will do it well. 3. It all depends/that all depends 在口语中，相当于it hasnt been decided yet，表示“那得看情况，还没有定下来” Are you going to the countryside for holiday？ It/That all depends. 4. Its up to sb. 在口语中，相当于its decided by sb. 表示“由决定，由负责，取决于” Shall we go out for dinner？ Its up to you.,Toms mother kept telling him that he should work harder , but _ didnt help . A. he B. which C. she D. it As _ happens , I have brought my umbrella with me . A. it B. this C. that D. such 3. _has already been pointed out , grammar is not a set of dead rules . A. As B. It C. That D. This 4. It was seven forty-five _he finished the work . A. when B. that C. when D. before,D,A,A,A,5. Was it because it snowed last night _ he didnt come ? A. why B. that C. when D. which 6. Does _ matter if he cant finish the job on time ? A. this B. that C. he D. it 7. European football is played in 80 countries , making _ the most popular sport in the world . which B. this C. that D. it 8._ is no doubt that he will succeed in his