人教版英语八年级上册Unit2Howoftendoyouexercise？句式精讲 句式精练

句式精讲
1. want to do sth.
want sb. to do sth.意为“想要某人做某事”。

want的用法还有：
want sth.想要什么
want to do sth.想要做某事例如：
She wants a cup of tea. 她想要一杯茶。

They want to go home. 他们想要回家。

He wants me to help him. 他想要我帮他。

【拓展】
want后接动词不定式时，相当于would like。

want (sb.) to do sth.=would like (sb.) to do sth.
2. be good for
be good for意为“对……有好处，对……有益处”，介词for后接名词或代词。

其反义词为be bad for，意为“对……有害处”。

例如：
Junk food is not good for our health. 垃圾食品对我们的健康没有好处。

Smoking is bad for you. 吸烟对你有害。

【拓展】
(1) be good to“对……好”，其反义短语为be bad to“对……不好”。

介词to之后一般接表示人的名词或代词。

例如：
She is very good to us. 她对我们很好。

The boss is bad to his workers.那个老板对他的工人不好。

(2) be good at“在……方面擅长”，介词at后面常接名词、代词或动词-ing形式，同义短语为do well in。

例如：
She is good at English and Chinese. = She does well in English and Chinese.
她擅长英语和汉语。

(3) be good with“和……相处得好；擅于和……相处”。

例如：
Are you good with children?你和孩子们相处得好吗？
3. try to do sth.
try为动词，意为“试图；设法；努力”。

指付出一定努力去做某事。

用法如下：
try (not) to do sth.努力（不）做某事 try doing sth.尝试做某事
try out实验 try on试穿（鞋、衣服等） try one’s best to do sth.尽某人最
大努力去干……
例如：
I try to answer the question.我尽力回答这个问题。

He tried swimming across the river.他试着游过河去。

She is trying on a new dress. 她正在试穿一件新连衣裙。

We should try our best to study English well. 我们应尽我们最大努力学好英语。

【拓展】
try作名词，意为“尝试；试图”。

例如：
Let me have a try.让我试一试。

4. help sb. to do sth.
help sb. to do sth.意为“帮助某人做某事”。

此句型也可以说成：help sb. do sth.。

例如：
He helps me to learn English.= He helps me learn English. 他帮助我学习英语。

【拓展】
(1) help sb. with sth.在某事上帮助某人例如：
My maths teacher helps me with my maths. 我的数学老师在数学上帮助我。

(2) help 也可以作名词，作名词时常用于下列短语：
with one’s help= with the help of 在……的帮助下例如：
With Mary’s help, I made rapid progress in English learning.
= With the help of Mary, I made rapid progress in English learning.
在Mary的帮助下，我在英语学习方面进步很快。

5. the same as/ be different from
the same as意为“和……一样/相同”例如：
I am in the same school as my younger sister. 我和我的妹妹在同一所学校。

be different from意为“与……不同”例如：
Saying a thing is very different from doing it. 说一件事和做一件事很不相同。

6. keep in good health
keep in good health意为“保持健康”例如：
If you want to keep in good health, you should eat more fruit and vegetables.
如果你想保持健康，你应该多吃水果和蔬菜。

【拓展】
(1) keep是动词，意为“保持……（持续的）状态”，其后常跟形容词、副词、介词短语或动词的-ing形式。

keep doing sth. 继续做某事
keep (sb. / sth.) + 形容词（使某人）保持某种状态
keep sb./sth. + 介词短语使……处于某种状态
keep sb. / sth. from doing sth.阻止，保护……不受
keep on doing sth.反复做某事
You should keep quiet. 你们应该保持安静。

He keeps at home because it is hot. 他一直待在家里，因为天气太热了。

(2) keep的相关短语：
keep up with赶上
keep a shop 开商店
keep an eye on照看
句式精练
一、句型转换。

1. I sometimes read storybooks at home. (对划线部分提问)
______ ______ do you read storybooks at home?
2. My sister watches TV twice a week. (对划线部分提问)
______ ______ ______ your sister watch TV?
3. I exercise two hours a day. (对划线部分提问)
______ ______ ______ do you exercise a day?
4. She eats junk food once a week. (对划线部分提问)
______ ______ ______ does she eat junk food a week?
5. I will be back in a month. (对划线部分提问)
______ ______ will you be back?
参考答案
1. How often
2. How often does
3. How many hours
4. How many times
5. How soon
二、根据句意完成下列句子，每空一词。

1. 你必须尽量少吃垃圾食品。

You must _______ _______ _______ less junk food.
2. 吃大量蔬菜有助于保持健康。

Eating a lot of vegetables _______ you _______ in good health.
3. 他说多锻炼对健康有好处。

He says more exercise _______ _______ _______ health.
4. 我的新MP3和Betty的一模一样。

My new MP3 is _______ _______ _______ Betty’s.
5. 如果你想要保持健康，就应该少吃肉。

If you _______ _______ keep healthy, you should eat less meat.
6. 你父亲多久锻炼一次？
_______ _______ does your father exercise?
7. 他周末几乎从来没有逛过街。

He _______ _______ goes shopping on weekends.
8. 我今晚想要去看电影。

I _______ _______ go to the movie tonight.
9. 我将尽最大努力帮助你学习英语。

I will _______ _______ _______ _______ help you _______ your English.
10. 他们中的一些人每星期逛两次商店。

Some of them go shops _______ _______ _______.
参考答案
1. try to eat
2. helps; keep
3. is good for
4. the same as
5. want to
6. How often
7. hardly ever
8. want to
9. try my best to; with 10. twice a week
三、补全对话。

A: I think I’m kind of unhealthy. ____1____
B: I am sorry to hear that.____2____
A: Every day I have a lot of homework to do.
B: Too bad! What do you usually do after school?
A:____3____
B: How many hours do you watch?
A:____4____
B: Why not spend your two hours of watching TV exercising?
A: I think you are right.____5____
A. Three hours at night.
B. I will do some exercise every night.
C. I usually watch TV.
D. I hardly ever exercise.
E. Why don’t you exercise?
参考答案
1. D
2. E
3. C
4. A
5. B。