人教版英语九年级Unit 6《When was it invented》知识点总结

Unit 6 When was it invented?

Section A

1. invent v. 发明inventor n. 发明家invention n. 发明可数名词

2. It’s used for scooping really cold ice cream. 它是用来舀很凉的冰激凌。

此句中be used 是被动语态形式，意为“被用来……”。Be used for 意思是“被用来做……”，介词for表用途，后面加名词或动名词。如：

The key is used for locking the door. 这把钥匙是用来锁门的。

知识拓展：

1）be used to do 表示“被用来做……”，used为动词过去分词，其中的to 为不定式符号，其后接动词原形，相当于be used for doing sth. 如：

A hammer is used to drive in nails. = A hammer is used for driving in nails. 锤子是用来钉钉子的。

2）be used to (doing) sth. 表示“习惯于做……”。如：

He is used to living here. 他习惯于住在这儿。

3）used to do sth. 表示“过去常常干某事”

He used to go to Beijing when be was young. 他年轻时常常去北京。

4）be used as 表示“把……用作……”，as 是介词，意为“作为”。

The piece of wood is used as a bench. 这块木头被用作凳子。

5) be used by 意为“被……使用”，强调使用者。The car is used by our manager.

3. operate用法：

1)“操作”Can you operate the computer?

2)“起作用，见效果” e.g. The sleeping pill operated at once.

3)“经营，管理” e.g. The company operates ten factories.

4)“动手术”operate on / upon sb. “给某人动手术”

e.g. The doctor will operate on his mother next week.

4. I think it would be better to have…我认为……比较好。

1)would 在此处表示料想或猜想、揣测，指说话人主观上认为不是很确定的可能性，后

接动词原形或完成式。如：

The study of Japanese would take much of your time.

学日语可能会花费你很多时间。

2)It is better to do sth. … 意思是“最好做……”，it 是形式主语，动词不定式为真正的主

语。如：

It’s better for him to go to school. = It’s better that he (should) go to school. 他最好去上学。

5. battery—operated adj. 电池控制的是名词+动词的运动分词构成的合成形容词

Section B

1. And he sprinkled lots of salt on them so they were salty. 他在它们上面撒了很多盐，所以它们

很咸。

1)sprinkle 表示“撒(某物)于(某物的表面上)；喷洒”。

常用结构：sprinkle A on B或sprinkle B with A. 如：

Can I sprinkle some pepper on my food? 或Can I sprinkle my food with some pepper?

我能把胡椒粉撒在我的食物上吗？

2)salty是名词salt(盐)加后缀-y构成的形容词。类似的词有：

cloud→cloudy, hair→hairy, rose→rosy, wind→windy, rain →rainy, snow →snowy, sleep→sle epy

2. The customer was happy in the end.顾客最后高兴了。

In the end 意为“最后，终于”，相当于finally, at last。其后不接of 短语，强调“虽然最初……，最后还是产生了一个……结果”。如：

He did one experiment after another and in the end he succeeded.

他做了一个又一个实验，最后终于成功了。

思维拓展

1）at the end 指“在……的末端，在……尽头”，可表示时间和空间，后常接of 短语。

如：

There is a shop at the end of the road. 在公路的尽头有一家商店。

I finished my novel at the end of 1999. 在1999年末，我完成了我的小说。

2）by the end 意思是“到……为止”，常与完成时态连用，通常指时间，后常与of 短语连用。

He had been to many countries by the end of 2000. 到2000年末时他已经去过许多国家。

3. by mistake 错误地如：I took the umbrella by mistake. 我不小心拿错了雨伞。

4. make sb./sth. +形容词使…怎么样It made me happy. 它使我高兴。

5. by accident 意外偶然I met her by accident at bus stop. 我在公共汽车站意外地见到了她。

6. Although tea wasn’t brought to the western world until 1610. T his beverage was discovered

over three thousand years before that. 尽管茶直到1610年才被带到西方国家，但是这种饮