这些都得用实意动词来表达。我们一起来看一看一些特殊的词吧。它们在接动名词和不定式时意义有所不同。
stop：这个词让好多同学大伤了一番脑筋，到底什么时候加to do，什么时候加 doing 呢?两者意义又有什么不同呢?OK, Come with me. 看下面两个句子。 When the teacher came in, they stopped to read. When the teacher came in, they stopped talking.
第一句的意思是\当老师进来时，他们停下来开始读书\。而第二句的意思是 \老师进来时，他们停止了说话\。所以stop to do sth表示\停止正在做的事情去干另一件事\。而stop doing表示\中断正在做的某事\。现在明白了吗? forget，remember，regret 这三个词用法基本相同，只要记住+doing 表示\事情已经做过\，+to do表示\事情还未做\就可以了。forget to do 忘记要去做某事。(未做) forget doing 忘记做过某事。(已
做) 如：The light is still on. He forgot to turn it off. 灯还在亮着，他忘记关了。 ( 没有做关灯的动作) He forgot turning the light off. 他忘记他已经关了灯了。( 已做过关灯的动作)
感官动词：see,watch, notice,look at,hear,listen to,smell,taste,feel 等 +do 表示动作的完整性，真实性 +doing 表示动作的连续性，进行性。如：I saw him work in the garden yesterday. 昨天我看见他在花园里干活了。(强调\我看见了\这个事实) I saw him working in the garden yesterday.（强调\我见他正干活\这个动作）昨天我见他正在花园里干活。
又到了我们趁热打铁的时间了，好学的你准备好了吗?
练习：
1. Wang Lin _______some help. Can you help him? A. needs
B. want C. need to D. ask
2. All of us enjoy _______football very much. A. play B. playing C. played D. to play
3. ---- The light in the classroom is still on. ---- Oh，I forgot___. A. turning it off B. turn it off C. to turn it off
D. having turned it off 4. I regret ___ the window. A. to do
B. to be doing C. to have done D. having broken
5. His grandparents saw her ___ up from childhood. A. grow B. grew
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C. was growing D. to grow
6. ---What's this in English?
---Sorry, I can't _____it in English. A. tell B. say C. speak D. talk
7. --- _____I finish my homwork today? ---No, you needn't. A. Can B. May C. Must D. Need
8. In Spring , the days ______longer and longer, the trees _______green. A. get, turn B. gets, turns C. got, turned
D. have got, have turned
9. When the traffic lights are red, you ________stop. A. can B. must C. won't D. needn't
10. When the teacher came into the classroom, I ________to my deskmate. A. stopped to talk B. stopped talking C. stop to talk D. stop talking
实战：
1. ---Whose calculator is it? --- It's ______. A. she's B. hers C. her D. she
2. _______December 23, Mr and Mrs Hopkens flew to London for a trip. A. on B. in C. at D. for
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3. The Science Museum is located ________the centre of the town. A. with B. near C. beside D. in
4. Do you think maths is ________important than English? A. very B. as C. more D. quite
5. The captain has a _______daughter. A. five-years-old B. five years old C. five year old D. five -year-old
6. Two fishermen saw ______in the sky while they were fishing by a river. A. something strange B. anything strange C. strange something D. strange anything
7. They got a Christmas tree and it was ______ours. A. so tall as B. so taller as C. as tall as D. as taller as
8. Who's ______woman over there? A. / B. the C. a D. an
9. A: _______have the scientists been there?B. For about two years. A. How many times B. How
C. What time D. How long
10. _______that pair of new ________expensive? A. Is, shoe B. Are, shoe C. Is, shoes D. Are, shoes
11. Dick jumped into a large hole ________he saw the bear. A. while B. as soon as C. until
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D. if
12. _______cold weather it is at the South Pole! A. What B. What an C. How D. What a
13. I don't know ________last night. A. why they didn't go to the movies B. when they didn't go to the movies C. why didn't they go to the movies D. when didn't they go to the movies
14. There aren't many oranges here, but you can take _______if you want to. A. few B. a few C. a little D. little
15. Tom failed in the exam. He looked ________. A. happy B. sadly C. upset D. lovely
第6讲：不定式
不定式和动词象一对姐妹一样亲密，本不该拆开来讲，可是篇幅有限，只能让他们分开了。不定式的构成非常简单，告诉我是什么？对！是to+动词原形。当然啦，to有时也可以不带。动词不定式没有人称和数的变化，可以担当除谓语外的任何句子成分。那什么时候可以不带to呢? Listen to me carefully.
不定式省to有四种情况：
使役动词 let,have,make 等后接不定式。如：Let him go! 让他走!
would rather，had better后。如：You had better stay at home.你最好呆在家里。
Why... / why not...后。如：Why not have a good rest on Sunday? 为什么星期天不好好休息一下呢? 感官动词 see, watch, look at, hear, listen to, smell,feel, find 等后作宾补，省to。如：I saw him dance. 我看见他跳舞。
注意：这些情况在被动句中可千万不可省to 哟！ 如：The boss made them work the whole night. 变成被动句：They were made to work the whole night. 不定式的特殊用法：
It与不定式：动词不定式可以做主语，但如果动词不定式太长，显得头重脚轻的，那么我们就可用形式主语it代替，而把真正主语(即不定式)放于句尾。
如: It is not difficult for me to study English well.(对我来说学好英语是可能的。)
不定式还可以充当句子的宾语，但有些动词，如find，think，believe 等，在语法上不能接受不定式作宾语，只有用it作形式宾语，从而把动词不定式置于句尾。这样的不定式可继续充当其宾语的作用。
如: I found it difficult to fall asleep.我发现很难入睡。
还有一点：动词不定式，还可用在how，when，where，what，which 等疑问代词或副词之后，
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