Question

I’m not good at Maths, so I don’t know _________ out this difficult Maths problem.

A. when to work B. who to work

C. what to work D. how to work

Answer 1

D

【解析】

试题分析：句意：我不擅长数学，因此我不知道怎样做出这道数学难题。when to work什么时候做出；who to work谁做出；what to work做出什么；how to work怎样做出。根据句意可知选D。

考点：考查疑问词加动词不定式。

考点分析： 考点1：不定代词

   不定代词指不是指明代替任何特定名词的代词。常见的不定代词有a11，both，each，every等，以及含有some-，any-，no-等的合成代词，如anybody， something，no one。这些不定代词大都可以代替名词和形容词，在句中作主语、宾语、表语和定语， 但none和由some，any，no等构成的复合不定代词只能作主语、宾语或表语；every和no只能作定语。如：  --- Do you have a car? --你有一辆小汽车吗？  --- Yes，I have one. --是的，我有一辆。  --- I don’t know any of them. 他们，我一个也不认识。

   不是指明代替任何特定名词的代词叫做不定代词，在句中可作主语、表 语、宾语和定语。现将几个常用的不定代词举例说明如下： 
1. some与any的区别 
1）some多用于肯定句，表示“一些，几个”作形容词时，后面可以接
①不可数名词+单数动词；
②可数名词+复数动词。 
Look! Some of the students are cleaning the library.     . Some rice in the bag has been sold out.    
2）any多用于疑问句、条件句和否定句中，表示“一些，任何”用作形容词
时，后面可以接
①不可数名词+单数动词；
②可数名词+复数动词。      
If you have any questions, please ask me.      There isn't any orange in the bottle.      Have you got any tea?      
3）any和some也可以作代词用，表示“一些”。any多用于疑问句或否定
句中，some多用于肯定句中。      How many people can you see in the picture?      I can't see any.
     If you have no money, I'll lend you some. 
  注意：与some, any结合的词如something, somebody, someone, 
anything, anyone, anybody在肯定句、否定句、疑问句、条件句中的用法，大致和some, any的用法相同。 
2. few, a few, little, a little在用法上的区别 
1）用作形容词： 
   含义 用法 
表示肯定 表示否定 用于可数名词 a few虽少，但有几个 few不多，几乎没有 
用于不可数名词 a little，虽少，但有一点 little不多，没有什么   I'm going to buy a few apples.   He can speak only a little Chinese.   There is only a little milk in the glass.   He has few friends. 
  They had little money with them.   
2）a little和little也可以用作副词，a little表示“有点，稍微”，little表示“很少”。 
  I'm a little hungry. (修饰形容词hungry)   Let him sleep a little. (修饰动词sleep) 
  Mary, go a little faster, please. (修饰副词比较级)   She slept very little last night. 
3. other, the other, another, others, the others的区别。 用  法  
代名词 形容词 单数 复数 单数 复数 不定 another 另一个 others 
别人，其他人 another (boy) 另一个（男孩） other (boys) 其他男孩 特定 the 
other 另一个 the others 其余那些人、物 the other (boy) 另一个男孩 
the other (boys) 其余那些男孩 
1）other可以作形容词用，后面可以跟单数或复数名词，意思是“其他的、别 的”。   Where are his other books? 
  I haven't any other books except this one. 
  
2）other也可以用作代词，与冠词the连用构成“the other”，表示两个人或物中的“另一个”。常与one搭配构成“one ..., the other ...”句型。 
  He has two brothers. One is 10 years old , the other is 5 years old.   She held a ruler in one hand and an exercise-book in the other. 
  
3）other作代词用时，可以有复数“others”，泛指“另外的人或物”。常与some搭配构成“some ...., others ...”句型。 
  Some went to the cinema, others went swimming.   This coat is too large. Show me some others, please.   
4）“the others”表示特指某范围内的“其他的人或物”。 
  We got home by 4 o'clock, but the others didn't get back until 8 o'clock.   In our class only Tom is English, the others are Chinese. 
5）another可以作形容词用，修饰后面的名词，意为“另一个”，还可以跟代词one. 
  You can see another ship in the sea, can't you? 
  Mary doesn't want to buy this skirt. Would you please show her another one?   
6）another也可以作代词用，表示“另一个”。 
  I'm still hungry after I've had this cake. Please give me another. 4. every与each的区别。 

                    each                                every 
           可单独使用                             不可单独使用 
           可做代名词、形容词                仅作形容词 
           着重“个别”                                着重“全体”，

毫无例外 
4)用于两者或两者以上中的每一个人或物 4)用于三者或三者以上每一个人或物   The teacher gave a toy to each child.   Each ball has a different colour.    当我们说each child, each student或each teacher时，我们想到的是一个人的情况。而当我们说every child和every student时，我们想到的是全体的情况，every的意思与all接近，表示他们都如此。 
  Every student loves the English teacher. = All students love the English teacher. 
Every child likes playing. = All children like playing. 
5. all和both的用法。
1）all指三者以上，或不可数的东西。谓语动词既可以用单数，也可以用作复数。在句中作主语、表语、宾语、同位语和定语。   All of us like Mr Pope. 我们都喜欢Pope先生。（作主语）   = We all like Mr Pope. (作同位语) 
  All the water has been used up. (作主语)   That's all for today. (作表语) 
  Why not eat all (of) the fish? (作宾语)   All the leaders are here. (作定语)   
2）both作代词。 
①与其他名词或代词并列出现，表示“两个都”。   Lucy and Lily both agree with us. 
  They both passed on their sticks at the same time.   How are your parents? They're both fine.   
②与“of +代词（或名词）”连用，表示“两者都”。   Both of them came to see Mary. 
  Both of the books are very interesting.   
③单独使用，表示“两者（都）”。 
  Michael has two sons. Both are clever. 
  I don't know which book is the better, I shall read both. 
  
3）both用作形容词，放在名词之前，修饰该名词，表示“两者都”。   Both his younger sisters are our classmates.  . There are tall trees on both sides of the street.

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