一个不定式在句中作宾语. 这种结构往往可转换成一个主从复合句, 不定式可改为一个由疑问词引导的宾语从句.
I don’t know what to do next.
= I don’t know what I shall do next.
我不知接下来该怎么办.
Have you decided which to choose?
= Have you decided which you should choose?
该挑选哪一个你作出决定了吗?
Do you know whom to go with?
= Do you know whom you shall go with?
你知道和谁一块去吗?
He showed me how to start the machine.
= He showed me how I could start the machine.
他示范给我看如何启动这台机器.
Did she tell you when to have the meeting?
= Did she tell you when we should have the meeting?
她告诉你什么时候开会了吗?
At last I got to know where to find his address.
= At last I got to know where I could find his address.
我终于明白在什么地方可找到他的住址.
15.co 《九年级英语第十五单元At home with the twins(第2页)》出自：www.89xue.com网
www.89xue.com st, spend, pay和take的用法
Sth. + cost + sb. + money (某物)花了(某人)多少钱
This sweater cost me 100 dollars.
这件毛衣花了我100美元.
Sb + spend + money + on/for + sth. 花钱于….
I spent 100 dollars on this sweater.
我花了100美元买这件毛衣.
Sb + spend + time + (in) doing sth. 花多少时间来做…
I spent my summer vacation (in) reading and fishing.
我的暑假是在看看书和钓钓鱼中度过的.
Sb + pay + (sb) + money + for + sth. 某人付给某人多少钱买某物
I paid (the shopkeeper) 100 dollars for this sweater.
我付给(店主) 100美元买这件毛衣.
It + take + sb + time + to do sth做某事花掉某人多少时间
It took me one hour to finish my homework yesterday.
昨天我花了一个小时来完成作业.
同步练习
I. 找出与划线部分读音不同的单词.
1. A. change B. make C. mistake D. dance
2. A. eighth B. either C. eighty D. eight
3. A. dark B. star C. hard D. war
4. A. heart B. clear C. hear D. dear
5. A. school B. moon C. wool D. food
6. A. weather B. leave C. head D. bread
7. A. rather B. together C. with D. think
8. A. enough B. cough C. laugh D. light
9. A. Britain B. chemistry C. dinner D. mind
10. A. whether B. whole C. who D. whose
II. 用所给动词的适当形式填空.
1.I’m very pleased ________ (hear) that your wife will come to our get-together.
2.The tow shirts both look nice. I can’t decide which ________ (buy).
3.Whose turn is it ________ (give) a talk in class?
4.What are you usually doing while your parents _______ (watch) TV?
5.Can you tell me how much the radio ________ (cost) you?
6.I ________ (do) some reading when the light went out.
7.How many times ______ your parents ________ (visit) our school this year?
8.Where _______ you _______ (go) for your last summer holiday?
9.How soon ________ you ________ (be) ready for the journey?
10.I ________ (not stay) there for long.
III. 单项选择
1.What have you decided to give your girl friend ________ her birthday?
A.at B. in C. with D. for
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