as与like用法讲解PPT教学课件

1、As用法详解 一、作副词，意为“相同地”，“同样地”。例如： They dont have as many airplanes. 他们没有同样多的飞机。 二、作连词 1. 引导时间状语从句 as与when，while都是引导时间状语从句的从属连词，含义都是当的时候。但它们有区别: (1). when作“当的时候”解，可以指较短的(一点)时间,也可指一段时间。从句的动作可以与主句的动作同时发生，也可以先于主句的动作发生。例如: John was having his dinner when I saw him. 当我看到约翰的时候，他正在吃饭第1页/共11页 (2). while常表示一段较长的

2、时间或一个过程，强调主句谓语动词与从句谓语动词同时发生或在从句动作过程中发生。例如: We must strike while the iron is hot. 要趁热打铁。 (3). 但属下列情形时，只用as, 而不用when或while。 用于表示同一个人的两种动作交替进行,指“一边,一边”。例如: The girl dances as she sings on the stage.那个女孩在舞台边唱歌边跳舞。 表示两个同步发展的动作或行为,译为“随着”。例如: As time went on / by, she became more and more worried. 随着时间的流逝，

3、她变得越来越焦虑。 As he grew older, he became more intelligent. 随着他年龄的增长，他变得更有才智了第2页/共11页 2. 引导原因状语从句 as，because，since都可以表示因果关系，连接原因状语从句，含义是“因为，由于”，但它们有区别：because表示的语气最强；as一般放在句首，语气较弱，较口语化；since常常用在书面语中，表示多为对方已知的、或稍加分析便可得知的原因，有时可译作“既然”。例如： I do it because I like it. 我做这件事是因为我喜欢。 Since many of the customers

4、work during the day, Billy has to collect the money at night. 因为许多顾客白天上班,所以毕利只好晚上去收钱。 As she has been ill perhaps shell need some help. 她由于生病可能需要些帮助。第3页/共11页 3. 引导让步状语从句 as与although (或though)，however (或no matter how)等都可以引导让步状语从句，含义是“虽然，尽管”，但它们有区别：although语气稍正式些，可放在句首，也可放在句中，主句中不能再用but，但可以用yet；as所表示的

5、语气较强，引导的让步状语从句用倒装语序；however引导让步状语从句时，它的后面可跟形容词或副词，也要用倒装语序。例如： Although they are poor they are happy. 虽然他们很穷，但很快乐。 Angry as he was, he managed to speak calmly. 虽然他很生气，但是他讲话很平静。 However hard the question is, he can answer it. 不管问题有多难他都能回答。第4页/共11页 注意：当as引导让步状语从句时，句子的倒装语序有以下三种形式： (1). 形容词或副词+as+主语+连系动词

6、be或实义动词。例如： Rich as he is, he never spends a cent on clothes. 虽然他很富有，但他从不花一分钱在衣服上。 Much as I admire his courage, I dont think he acted wisely. 我虽然佩服他的勇气，但我认为他这样做是不聪明的。 (2). 名词+as+主语+连系动词be (注意句首的名词不带冠词)。例如： Child as he is, he knows a lot. 尽管他是个孩子，但懂很多事情。 Boy as he was, he was chosen king. 尽管他还是个孩子，但

7、却被立为国王。 (3). 实义动词+as+主语+助动词如果没有助动词，则要加上一个do(does或did)。例如： Try as he may, he never succeeds. 尽管他很努力，但总是不成功。 Change your mind as you will, you will gain no additional support. 即使你改变主意，你也不会得到另外的支持第5页/共11页 4. 引导方式状语从句，意为“如”，“像”，“按照的方式”。如: I want you to tell my friend your very interesting experience exa

8、ctly as you have told it to me. 我想让你像给我讲述的那样，给我的朋友讲一讲你那段极其有趣的经历。 Remember, you must do everything as I do. 记住，你必须按照我做的那样做一切。第6页/共11页 5. 引导比较状语从句,用于“as.as.或not so/ as.as.”中,前一个as是副词,后一个as是连词，意为“如(不如)一样”。如: (1). You hate her as much as I (=as I hate her). (2).I dont speak English so/ as well as he doe

9、s第7页/共11页 四、作介词 1. 表示 “好像(某人)”，例如: They entered the building disguised as cleaners. 他们化装成清洁工人的模样进入大楼。 2. 表示“作为，当作”，例如： I found a job as a teacher. 我找了一份教师的工作。 3. 表示“当某人是(某身份)时。例如： As a child, she was sent to three different countries. 她儿时去过三个不同的国家。 4. 表示“因某人是(某身份)”，例如： As her private secretary he ha

10、s access to all her correspondence. 他是她的私人秘书，能接触到她所有的信件。 注意1：as引导的介词短语大多用作状语，as译为作为，少数情况可引起宾语补足语。例如: As a Party member, Ill take the lead in everything. (状语) She works as a nurse. (状语) Tom has me as one of his best friends. (引起宾语补足语)第8页/共11页 五、用于一些固定搭配 1. as good as差不多，几乎 Dont worry, the matters as

11、good as settled. 别担心，问题差不多已经解决了。 When the car was repaired, it looked as good as new. 这辆汽车修理好的时候，看起来差不多就像新的一样。 2. as if as though 似乎；好像 He behaved as if nothing had happened. 他装着若无其事的样子。 She treats him as though he was her own son. 她待他好像待自己的儿子一样。 另外，as if可以接一个动词不定式短语。例如： He waved his hand to me as i

12、f to have something to tell me. 他向我挥手好像有什么要告诉我。 3. as well as 同（一样也）；和；还 Joan can speak Chinese as well as English. 琼能讲英语还能讲汉语。 He spent all his money, as well as wasting his time. 他不仅浪费了时间，还花光了他所有的钱。 4. suchas, such as 像这样的 I bought a lot of fruits, such as apples, oranges, bananas and so on. 我买了许多

13、种水果，像苹果，桔子，香蕉等。 We had such books as you never saw. 我们有一些你从未看过的书。第9页/共11页 5. as for 至于某人（某事物） We had a delightful weekend in the country. As for the traffic, we had no difficulty. 在乡下我们度过了一个愉快的周末。至于交通，我们没遇到任何困难。 6. as to 关于某事物；提到某事物 I dont know anything as to the others. 至于其他，我一无所知。 7. so as to 以便, 为了 Students should take notes so as to make revision easier. 学生应当记笔记，以便容易复习。 8. as a matter of fact 其实；实际上 As a matter of fact, Im very fond of housework. 其实，我很喜欢做家务。 9. a