初中动词不定式整理

十八、It takes sb some time to do sth.花费某人一段时间干某事.
It took me half an hour to do my homework yesterday.昨天我花了半小时做回家作业.
It took Jim an hour and a half to read the book.吉姆花了一个半小时看这本书.
It took mother one and a half hours to do the housework.母亲花了一个半小时干家务.
用汉字表述上面的句型为:It + take + 人 + 一段时间 + to do sth.
一段时间形式往往为像这样的例子:fifteen minutes15分钟,an hour一个小时, two days两天, half a month半个月,a year and a half一年半...等等

十九、不定式的特殊句型too…to… 
①too…to　 太…以至于…
　　He is too excited to speak. 
　　他太激动了，说不出话来。
　 ---- Can I help you ? 需要我帮忙吗?
　 ---- Well, I'm afraid the box is too heavy for you to carry it, but thank you all the same.　不用了。这箱子太重，恐怕你搬不动。谢谢您。
②如在too前有否定词，则整个句子用否定词表达肯定， too 后那个词表达一种委婉含义，意 为"不太"。
　 It's never too late to mend.　(谚语)
　　　改过不嫌晚。
③当too 前面有only, all, but时，意思是：非常… 等于very。
　 I'm only too pleased to be able to help you. 我非常高兴能帮助你。
　 He was but too eager to get home. 他非常想回家。

二十、不定式的特殊句型Why not 
　 "Why not +动词原形"表达向某人提出建议，翻译为："为什么不……?" "干吗不……?"
例如：
　　　Why not take a holiday?
　　　干吗不去度假?

  练习 
 根据括号内的动词,用适当的形式填空,空内可能不只填一个词,使句子完整意思正确
1. They usually __________ kites on Sundays. (fly)
2. Look! The dogs __________ after the cat. (run)
3. Miss Gao __________ English in our school since she came here. (teach)
4. The class meeting _________ last Wednesday afternoon. (hold)
5. You should let him __________ the work by himself. (finish)
6. Meimei __________ to wash the old woman’s clothes twice every week. (go)
7. Mr Jiang __________ us Chinese last term. (teach)
8. My father __________ back from Japan tomorrow. (come)
9. It’s seven o’clock now. The Greens __________ breakfast together. (have)
10. Jim __________ many Chinese songs since he came to China. (learn)
11. Please remember __________ the window when you leave the room. (close)
12. After school some students began to do some __________ in the classroom. (clean)
13. English __________ widely in the whole world today. (speak) 

答案

1. fly, 2. are running, 3. has taught, 4. was held, 5. finish, 6. goes / went,

 7. taught, 8. is going to come / is coming / will come / comes 9. are having,

10. has learned, 11. to close, 12. cleaning,

13. is spoken 

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