some any复合不定代词

更新时间:2023-07-01 01:27:49 阅读: 评论:0

语法:情态动词 should/ought to/ had better
shouldought to
1. should 作为情态动词,没有人称和数的变化。通常用来表示现在或将来的责任或义务,译作应该应当,这时它可以和 ought to 互换使用。例如:
  should /shouldn’t
I/You/He/She/We/They                          + discuss it.
ought to /ought not to  炒期货是什么意思
You should /ought to complete your test in time.
你们应该按时做完你们的实验。
一般疑问句及回答: --- Should we discuss it now?  --- Yes, we should/ ought to.
                --- Ought we to discuss it now? --- No, we shouldn’t/ ought not to.
Eg: We ought to be more careful with our homework.                         
They should finish the work on time.                               
He ought not to do it at once.                                   
2. ought to/ should区别
  should如胶如漆谈的是自己的主观看法
  ought to则更多反映客观情况,在谈到法律、义务和规定时使用。
  Eg We shouldought to help each other and learn from each other in our work
        She is your mother, so you ought to support her
        We ought to go and e Mary tomorrow, but I don’t think we will
had better
  为固定搭配,无人称,数和时态的变化,用来表示给予建议,后面接动词原形,had better
通报格式  do sth意为最好干某事…”
  Eg: You had better be on time for your lessons. 你最好准时上课。
had better 通常缩写成’d better
  Eg: You had better be careful when you cross the street.= You’d better be careful when you 
      cross the street. 当你过马路的时候,你最好小心点
肯定形式:had better do sth最好干某事 
  否定形式: had better not do sth最好不要干某事女孩英语单词
  Eg: You had better go and e a doctor. 你最好去看下医生。
      He had better not go out now. 他最好现在不要出去。
含有 had better的反义疑问句,had作为助动词, 否定用 hadn’t
  Eg: We’d better stay at home today, hadn’t we? 我们最好是呆在家里,是吗?
      She had better get ready for the coming exam,          ?
其他情态动词复习
can(could)be able to
  can=be able to 朝代顺序能够,表示能力
区别:
can只有两种时态, can could
be able to 有多种时态, was/were able to, will be able to, have/has been able to
表示过去通过努力终于做成了某事要用be able to,而不能用can
  Eg上善若水图片: I was able to swim to the bank after the boat turned over.
can能表否定猜测be able to不能。can的这种用法主要用于疑问句和否定句。
  Eg:Somebody is knocking at the door. Who can it be?
  It can’t be our teacher who is knocking at the door.
  其肯定形式是must be。如: It must be our teacher who is knocking at the door.
have tomust
'必须'  have to 表示客观的必须,
must 表示主观的必须
  My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉
  害,我只得半夜里把医生请来。(客观上需要做这件事)
  He said that they must work hard. 他说他们必须努力工作。(主观上要做这件事)
have to有人称、数、时态的变化(has to/had to
must只有一种形式。He had to look after his sister yesterday.
否定结构: don't have to 表示"不必"
              mustn't 表示"禁止"
  You don't have to tell him about it. 你不一定要把此事告诉他。
  You mustn't tell him about it. 你一定不要把这件事告诉他
  []:回答must提出的问题
  Eg---Must I do it now?
  ---Yes, you must. / No, you needn't.
may might
表示推测,意思是:可能,可用于肯定与否定推测。
It may rain this evening. You'd better take an umbrella. 今晚可能要下雨,你最好带上雨伞。 纽扣英语
may过去式为might
need
做实义动词  需要  need to do sth  否定形式:don’t need to do sth
做情态动词  需要  need do sth    否定形式:needn’t do sth
  Eg: You need finish / need to finish your homework today.
[]need/must 提问,回答需要注意:
Need I do my homework now? --Yes, you must(你必须)./ No, you needn’t/you don't have to(你不必).
Must I finish my homework now?--Yes, you must(你必须)./ No, you needn’t/you don't have to(你不必).
课堂作业
一、单项选择。
(    ) 1. John_____ come to e us tonight, but he isn't very sure yet.
      A. may    B. can    C. has to    D. must
(    ) 2. They _____ do well in the exam.
pr域名      A. can be able to    B. be able to  C. can able to  D. are able to
(    ) 3. --May I take this book out?  --No, you_____.
      A. can't    B. may not    C. needn't    D. aren't
(    ) 4. You_____ go and e a doctor at once becau you're got a fever.
      A. can    B. must    C. dare    D. would
(    ) 5. --Can you speak Japane?  --No, I______.
      A. mustn't    B. can't    C. needn't    D. may not
(    ) 6. --He______ be in the classroom, I think.
        --No, he ______ be in the classroom. I saw him go home a minute ago.
    A. can; may not    B. must; may not    C. may; can't    D. may; mustn't
(    ) 7. --Shall I get one more cake for you, Dad?
        --Thanks, but you______, I've had enough.
    A. may not    B. must not    C. can't    D. needn't
(    ) 8. Even the top students in our class can't work out this problem, so it    _be very difficult.
    A. may    B. must    C. can    D. need

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