八年级上册英语Unit2知识点复习资料

Unit 2 How often do you exercise

一、必背短语。

【教材内容解析】

Section A

1.What do you usually do on weekends? (P. 9)

on weekends意为“在周末”，泛指每个周末=on the weekend。

I like going fishing on weekends/on the weekend.

2.help with homework (P. 9)

help表示“帮助”时，常用的句型为：help sb. with sth. 帮助某人某事；

help sb. (to) do sth. 帮助某人做某事。

Can you help me with my homework?

He often helps his mother clean do housework.

3.sometimes (P. 9)

sometimes是频度副词，意为“有时”，相当于at times。

I sometimes play computer games on weekends.

【拓展】辨析sometimes, some times, sometime与some time

4.hardly ever (P. 9)

hardly作副词，表示“几乎不”；hard用作副词表示“努力地、猛烈地”，作形容词表示“硬的、困难的”。

He hardly works.

He works hard.

This is hard work.（work不可数）

5.How often do you watch TV?(P. 9)

how often意为“多久一次”用来提问频率，常用表示频率的副词或者短语来回答，如twice a week, sometimes, every day, always等。

-How often do you play sports?-Three times a week.

【拓展】辨析how long, how soon和how often

6.Hi, Claire, are you free next week? (P. 10)

free作形容词表示“空闲的、有空的”，be free相当于have time。

I will be free next week.=I will have time next time.

【拓展】free作形容词，还可以表示“免费的、自由的”，be free to do sth.“自由地做某事”。The tickets are free. You are free to come and go.

7.How come?(P. 10)

How come意为“为什么呢、怎么回事”，用于询问某事为什么会发生，可以单独使用也可以后接陈述句。How come you didn’t wait for me for a while?

8.Well, how about Tuesday? (P. 10)

How about相当于what about意为“怎么样”，用来征求对方意见或者询问情况，后接名词或者动名词。It’s sunny today. How/ What about playing tennis?

9.Oh, I have to play tennis with my friends. (P. 10)

have to表示“不得不、必须”，强调客观需求；must侧重主观上自己认为有必要做某事。

It is getting dark. I have to go home now.

We must take care of our parents.

10.I go to the movies maybe once a month.(P. 11)

maybe作副词，表示“可能、也许”，常常放在句首，可以与may be相互转换。

Maybe he is a foreigner.=He may be a foreigner.（may是情态动词）

11.How often do they stay up late? (P. 11)

stay up意为“熬夜”，表示“熬夜做…”时，用“stay up doing sth.”。

It is a bad habit to stay up late.

12.He plays at least twice a week.(P. 11)

at least表示“至少”，反义词为at most“最多”。

Section B

1.She says it’s good for my health. (P. 12)

(1)be good for意为“对……有益”，反义词是be bad for“对……有害”。

Doing sports is good for you.

(2)health是不可数名词，意为“健康”，in good health表示“很健康”，形容词为healthy，副词是healthily。 To keep healthy, you should eat healthily.

st month we asked our students about their free time activities. (P. 13)

ask sb. about sth.意为“询问某人某事”。

Someone is asking Lucy about the wonderful building.

3.Here are the results. (P. 13)

here和there置于句首，谓语动词是be动词或者come, go等不及物动词时，主语为名词时，用倒装结构，即主谓调换位置，若主语是代词时，主谓不倒装。

Here comes the bus.倒装 There he goes.不倒装

4.And twenty percent do not exercise at all!(P. 13)

not...at all意为“一点儿也不、根本不”；not at all表示“没关系、不用谢”。

I don’t know about it at all.

---Thank you very much.---Not at all.

5.We all know that many students often go online...(P. 13)

此处online用作副词，表示“在线、联网”，也可以用作形容词，意为“在线的、联网的”。Many people like buying things online. The online games are popular with children.

6.The answers to our questions about watching television were also interesting. (P. 13) 名词answer后常跟介词to，表示“……的答案”，类似的名词还有key，solution，ticket。Your answer to the question is right.