4.The potato chips were invented by mistake.由于错误,薯片被发明了。

Mistake 做名词,意为 “弄错,误解”如:

You have made a foolish mistake.　　 你犯了一个愚蠢的错误。

Mistake 作动词,意为 “弄错,误解”如:

She didn’t speak very clearly so I mistook what she said.她讲的不清楚,所以我误解了她的话。

By mistake 意为 “错误地,弄错地”.

I took his backpack by mistake. 　我错拿了他的书包。

He put salt in her cup of tea by mistake.　 他错把盐放进她的茶里。

3.The custom said they weren’t salty enough.这个顾客说菜不够咸。

(1)said 后是宾语从句,省略了that.当宾语从句主句用一般过去时, 从句也要用过去的某种时态。如:

He asked me whom I was waiting for. 他问我在等谁.

(2)enough修饰形容词或副词时应后置. 如:

The little child was not old enough to go to school.这个小孩太小了,不能去上学.

但enough 修饰名词时,可以放在名词之前,也可以放在名词之后。如:

I have enough money to buy it.( I have money enough to buy it.)

2.It’s used for scooping really cold ice cream.它是用来舀十分冰冷的冰淇淋的.

句型be used for 意为　 “被用来做……”,介词for表示用途,后接名词或动名词。　 如:

(1)　　　 sweater is used for keeping warm.毛衣是用来保暖的。

(2)　　　 The knife is used for cutting.小刀是用来切削东西的。

1.I think the telephone was invented before the car.我认为电话在汽车之前发明的。

(1) I think 后接的一个分句做I think 的宾语,这个分句称叫做宾语从句。

(2)was invented 是被动语态.

(3)invent 做动词,意为 “发明,创造”,其名词有两种形式:一种为inventor “发明者”;一种为 invention “发明,创造”

例如:Edison was a great inventor, he invented more than 1,000 inventions in his life.

2. be used to doing sth. 习惯于做某事． 　3. according to 根据，按照 　4. in this way 这样 　5. give sb. some time to do sths　 给某人一些时间做某事. 　　The teacher gives the student two hours to do homework. 老师给同学们两个小时做作业。 　6. help sb. do sth.　 帮助某人做某事　 　　 I’ll help you leave the island.　 我将帮助你离开岛屿。 　7. by accident 偶然的 　 　by mistake 错误的 　8. fall into 落入，陷入 　9. in the end= at last=finally 最后 　 10. make sb. adj. 使某人… 　　 make me happy　 使我开心 　11. sb. called\named …　 被叫作，被称作 　　 a chef called Black.　 一个叫布莱克的厨师 　　 a doctor named Amy　 一个叫艾米的医生 　12. sprinkle a lot of salt on chips　 在薯片上洒大量的盐 　13. decide to do sth.　　 决定做某事 　　 I decide to taste the hot tea　 我决定品尝热茶。 　14. not…until　 直到…才 　　You can’t leave until I arrive.　　　 直到我到了你才能走。 　　I can’t watch TV until I finish my home work.　 直到我完成作业，我才能看电视。 　15. be discovered in　 年代 　　 be discovered in　 地方 　　 The tea was discovered in China in 1610. 茶是在1610年在中国被发现的。 　16. over three thousand years　 　三千年以上 　17. produce a pleasant smell　 产生一股令人愉快的气味 　18. over an open fire.　　 　在明火上 　19. in sixth century　　 　 在第六世纪 　　 in nineteenth century.　 　在十九世纪

2. topic: Inventions.

Teaching aids: multi-media, a recorder

Step I: Greetings

　 　T: Good morning, class!　 Ss: Good morning, Mr Luo.

　 T: Who is on duty today?　 Ss: Yes, I am.　 …

Step II: Lead-in

T: Good morning, boys and girls. Today we will a new unit about inventions. You can see inventions all around us, from TV to car, from food to clothing. We should say nobody can live without them. Don’t you think so? Can you imagine one day without inventions?

Ss: That’s impossible.

T: Yes, we live in a world of inventions. These inventions make our life easier and more comfortable. In this unit, we will learn some inventions and their history.

First, say the ancient China was very great in the world. It was famous for the four great inventions. Do you know the famous inventions in the ancient China? Guess Ss to talk about it. Show four great inventions’ pictures to Ss.

Second, Do you know Edison? Do you know what Edison was invented in his life? Get Ss to talk about Edison’s inventions.

Step III: Listening

Do you know the modern inventions in the world? They have changed our life more. Get Ss to guess what they are. Show some modern inventions’ pictures to Ss.

Get Ss to listen to the tape, and number from one to five(Which kind of invention is in front, which kind of invention is in after).

Get Ss to listen to the tape again. Listen and match the inventions with the dates.

Step IV: Practice the conversations.

　 Practice 1:　 Get Ss to practice this conversation. And ask some students to practice in class.

--- When was the phone invented?　 --- I think it was invented in 1876.　 Practice 2: Show another modern inventions to Ss. For example, bike, camera … Ask some students to practice the conversation in classs.

A: When was the phone invented?　 B:　 It was invented in 1876.

A:　 Who was it invented by?　　　 B:　 It was invented by Bell.

Step V: Some pictures about Chinese Spaceflight

Show some pictures to students. Let Ss guess who they were invented by. Raises student's national sense of pride.

Step VI : Exercises

　 There are some exercises about the lesson. Review the important points in class.

Step VII: Homework

Review new words and finish the exercises in Page99-100(课时作业第一课时)

1. When was / were … invented?　　 It was / They were invented in …

　　 Who was / were … invented by?　 It was / They were invented by …

3. 通过了解一些中外发明者的事迹，培养勤奋学习、立志为社会多做贡献的精神。

Teaching important points:

2. 能用被动语态正确表达发明物的历史。如：It was invented in 1876. It was invented by Bell.

1．学会使用含有被动语态的不同句型结构“When was it invented?” 和“Who was it invented by?”来谈论各种发明物的历史。