跪求as的用法,越多越好,还有must,have to,have got to的联系与区别,今天就要,答案尽量的越短越好,

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跪求as的用法,越多越好,还有must,have to,have got to的联系与区别,今天就要,答案尽量的越短越好,
跪求as的用法,越多越好,还有must,have to,have got to的联系与区别,今天就要,
答案尽量的越短越好,

跪求as的用法,越多越好,还有must,have to,have got to的联系与区别,今天就要,答案尽量的越短越好,
as的用法:
  as……as
  AS +adj(原级)+AS
  AS +adv(原级)+AS
  as soon as 一……就
  as soon as possible 尽可能快地
  as early as possible 尽可能早的
  as carefully as you can 尽可能认真地
  as careful as you can 尽可能认真的
  must,have to,have got to的:
  一、must的用法
  1)表示主观的义务和必要,主要用于肯定句和疑问句,意思为 “必须……,得……,要……”;由must引起的疑问句,肯定回答要用must或have to,否定回答要用needn’t或don’t have to,意思是“不必”;must的否定形式mustn’t表示禁止,意思是“不能,不许”.如:
  We must find a good method to learn computer well.
  我们必须找一个学好电脑的方法.
  —Must I finish the task right now?
  我现在必须完成这个工作吗?
  —Yes,you must./ Yes,you have to.是的.
  (—No,you needn’t./ No,you don’t have to.不,不必.)
  You mustn’t come here without permission.未经允许,你不能来这儿.
  2)表示肯定的猜测,常用于肯定句中,意思为 “一定是,必然……”.
  注意must表示推断或猜测的几种情况:
  Your sister must be a doctor in this hospital.(现在的猜测)
  你姐姐一定是这家医院的医生.
  He must be reading newspapers in the reading room now.
  (正在进行的猜测)
  他此刻一定正在阅览室读报.
  It must have rained last night,for the ground is wet.(过去的猜测)
  昨晚一定下雨了,因为地面上是湿的.
  二、have to / have got to 的用法
  1)must表示一种主观的需要,而have to 表示一种客观的需要,意思是“不得不”.如:
  I have to attend an important meeting this afternoon.
  今天下午我不得不参加一个重要的会议.
  Mother is out,so I have to look after the shop.
  妈妈不在家,因此我不得不照看商店.
  2)have to 的否定形式是don’t have to,相当于needn’t.如:
  They don’t have to buy a computer at present.
  他们目前没有必要买电脑.
  3)have to 与have got to 常可以互换.