What are they? They are four inventions of China gun powder paper making printing compass

When was the light bulbs invented? Who was the telephone invented by ? light bulbs It was invented in It was invented by Edison Edison

When was the TV invented? Who was the alarm clock invented by ? It was invented in It was invented by Eric-Sha Shu Wa alarm clock Eric-Sha Shu Wa （埃里克 · 沙舒瓦） 1788

Bill Hewlett 1971 calculator When was the TV invented? Who was the calculator invented by ? It was invented in It was invented by Bill Hewlett

When was the computer invented? Who was the computer invented by ? 1976 Cray It was invented in It was invented by Cray computer

When was the car invented? Who was the car invented by ? 1885 Henry Ford It was invented in It was invented by Henry Ford car

When was the airplane invented? Who was the airplane invented by ? 1907 Wright It was invented in It was invented by Wright airplane

When was the TV invented? Who was the TV invented by ? It was invented in It was invented by Baird. Baird 1927 television

When was the TV invented? Who was the telephone invented by ? It was invented in It was invented by Bell. Bell 1876 telephone

When was the TV invented? It was invented in Who was the telephone invented by ? It was invented by Bell.

结构 : be + V-p.p. am / are / is + 动词的过去分词 was / were + 动词的过去分词 一般现在时的被动语态 : 一般过去时的被动语态 :

一、英语的谓语动词有两种语态 : We speak English. 主语谓语宾语 English is spoken by us. 主语谓语宾语 宾变主, 主变宾, 前加 by; 动变被, 看清 be, 结构分别 be+ pp 主动语态 被动语态

主变被解题步骤 : 1. 找宾语 —— 即动作的承受者。 They make shoes in that factory. Shoes 2. 判断宾语的单复数 —— 即 be 动词的单复数。 are were 3. 判断动词的时态 —— 即 be 动词的时态。 4. 修改谓语的时态 —— 即原句动词改为过去分词。 made 5. 修改原句的主语 —— 即 by+ 主语 / 宾语。 by them.

Tom broke the window. The window was broken by Tom. Tom broke the windows. The windows were broken by Tom. He broke the windows. The windows were broken by him.

Many people speak English. ( 主动语态 ) English is spoken by many people The naughty boy broke the window yesterday. ( 主动语态 ) The window was broken ( by the naughty boy) yesterday.

We bought some books. 主动句与被动句之间的转换 Some books were bought ( by us ) 主语 谓语动词主动语态的过去式 宾语 主语 谓语动词被动语态的过去分词 介词 + 宾语

被动语态的几种句型 肯定句 主语 + be + 过去分词 + (by…) A sweet song was sung by her on the stage. 2 否定句 主语 + be + not + 过去分词 + (by…) 3 一般疑问句 Be + 主语 + 过去分词 + (by…)? A sweet song wasn’t sung by her on the stage. Was a sweet song sung by her on the stage? 4 特殊疑问句 疑问词 + be + 主语 + 过去分词 + (by…)? Where was a sweet song sung by her?

We usually hear him play in the next room. He is usually heard to play in the next room.

He rides the motorbike to his factory every day. The motorbike is ridden to his factory every day.

He bought his friend some fruits yesterday. His friend was bought some fruits yesterday. Some fruits were bought for his friend yesterday.

1.People use knives for cutting things. Knives ______ ______ for cutting things. 2.The students clean the windows of their classroom twice a month. The windows of their classroom______ _______ twice a month. are used are cleaned 句型转换

3.I found the ticket on the floor. ______ ______ ______ ______ on the floor. 4.I told her to return the book in time. She ______ _______ to return the book in time. The ticket was found was told

5. His doctor made him have only two meals a day. He ______ _______ _______ _______ only two meals a day. 6.Now people can use computers to help them. Now computers _______ ______ ______ to help them. was made to have can beused

1. He wrote an article last week. An article was written by him last week. 2. The people make history. History is made by the people. 把下列的主动句变为被动句。

3. Do people use Chinese only in China? Is Chinese used by people only in China? 4. They didn’t visit the city two years ago. The city wasn’t visited by them two years ago. 5. Where did you make them? Where were they made by you?