人教版必修四英语第四单元语法-ppt课件.ppt（无音视频）

1、1ppt课件-ing形式作状语形式作状语2. -ing短语作状语一般表示一个次要的动作，短语作状语一般表示一个次要的动作， 一般都可以变为一般都可以变为相应的状语从句相应的状语从句或并列句。或并列句。1.-ing短语在句子中可作状语，来修饰谓语动词短语在句子中可作状语，来修饰谓语动词或整个句子，表示动作发生的或整个句子，表示动作发生的时间、原因、条件、结果、让步或伴随时间、原因、条件、结果、让步或伴随等情况。等情况。2ppt课件1. 作时间状语作时间状语-ing短语作时间状语要置于句首。如：短语作时间状语要置于句首。如：Hearing the bad news, they couldnt he

2、lp crying. =When_, they couldnt help crying. 当听到这个不幸的消息时，他们情不自当听到这个不幸的消息时，他们情不自禁地哭了起来。禁地哭了起来。they heard the bad news3ppt课件Having received his letter, I decided to write back. 收到他的信后，我决定给他回信。收到他的信后，我决定给他回信。 =After_, I decided to write back.I had received his letter注意：当注意：当v-ing形式所表示的动作发生在谓语动形式所表示的动作发

3、生在谓语动词动作之前时，应使用完成式：词动作之前时，应使用完成式：having done_(finish) his homework, he rushed out to play basketball.Having finished4ppt课件Having been to the Great Wall many times, he didnt go last week. =_he had been to the Great Wall many times, he didnt go last week. 因为他已经去因为他已经去过长城许多次，上周他就没去。过长城许多次，上周他就没去。Becaus

4、e (As)=Because_, he couldnt go to sleep. 因为太生气了，他不能入睡。因为太生气了，他不能入睡。2. 作原因状语作原因状语-ing短语作原因状语置于句首。如：短语作原因状语置于句首。如：Being so angry, he couldnt go to sleep.he was so angry5ppt课件3. 作条件状语作条件状语-ing作条件状语置于句首或句末。如：作条件状语置于句首或句末。如：Working hard, you will succeed. =If_, you will succeed. 如果你勤奋一点，你就会成功。如果你勤奋一点，你就会

5、成功。you work hard6ppt课件4. 作让步状语作让步状语 -ing短语作让步状语，可置于句首或短语作让步状语，可置于句首或 句末，常与句末，常与even if, though 连用。如：连用。如：Though working from morning till night, his father didnt get enough food.=Though_, he didnt get enough food. 虽然他父亲从早到晚拼命地干活，但是他还虽然他父亲从早到晚拼命地干活，但是他还是挣不到足够的吃的。是挣不到足够的吃的。 his father worked from morn

6、ing till night7ppt课件 5. 作伴随状语作伴随状语置于句首或句末。如：置于句首或句末。如：They came into the classroom, singing and laughing. 他们又唱又笑地走进教室。他们又唱又笑地走进教室。=They sang and laughed; they came into the classroom.8ppt课件When working in the factory, he was an advanced worker.=When_, he was an advanced worker.注意：注意：1. -ing短语与短语与whe

7、n, while, though, until, if等连词连用时，等连词连用时，相当于这些相当于这些连词引导的一个从句连词引导的一个从句。如：如：he worked in the factory连词+现在分词9ppt课件Though willing to attend the party, he refused the invitation. = Though he was willing to attend the party, 用用 “连词连词+现在分词现在分词”的结构的结构If you play all day, you will waste your valuable time.=I

8、f playing all day, you will waste your valuable time.10ppt课件2. 动词动词-ing形式在句中作状语时，其形式在句中作状语时，其逻逻辑主语辑主语与主句的主语与主句的主语保持一致保持一致。如：。如： He traveled on the plane like this, keeping the tortoise hidden in a blanket. = When he traveled on the plane like this, he kept the tortoise hidden in a blanket.11ppt课件1.

9、a. Hearing the news, tears ran down her face. b. Hearing the news, she cried out sadly.2. a. Entering the classroom, I found nobody in it. b. Entering the classroom, nobody was found in it.Choose the correct sentence.FTFT12ppt课件3. a. Looking out through the window, the garden was beautiful. b. Looki

10、ng out through the window, we saw a beautiful garden.4. a. Reading the evening newspaper, a dog started barking. b. I was reading the evening newspaper when a dog started barking.FTTF13ppt课件5. a. Being fine, we will have the sports meeting next week. b. It being fine, we will have the sports meeting

11、 next week.-ing形式的否定式为在其前面加形式的否定式为在其前面加not。如：如： He sat there, not knowing what to say.FT14ppt课件语态语态时态时态主动语态主动语态被动语态被动语态一般式一般式完成式完成式(not) doing(not) being done(not)having done(not)having been done15ppt课件注意：注意： 1.当当v-ing形式与句子的主语之间存在着逻辑上形式与句子的主语之间存在着逻辑上的的动宾关系动宾关系时，应使用被动式：时，应使用被动式：being doneBeing helped

12、 by the teacher, she will learn English well.2. 当当v-ing形式形式被动式的动作发生在谓语动词动被动式的动作发生在谓语动词动作之前作之前时，应用完成被动式：时，应用完成被动式：having been doneHaving been shown the lab, we were taken to see the library._(translate)into many languages, the book was widely read all over the world.Having been translated16ppt课件1. Their car was caught in a traffic jam, thus _ the delay. A. to cause B. causing C. caused D. causeExercise17ppt课件2. After seeing the movie, _. A. the book was read by him B. the book made him want to read it C. he wanted to read the book D. the reading of the book interested him18ppt课件