sentence:
  U need to workout./U r just in time.
  I need that book badly./Donot be so childish.
  Your hand feels very cold.

key words and expressions:
  straight        径直,诚实的           far                 更多
  act              行动,演戏,担当      shortly             立刻,不久
  a while ago  刚才,方才              short a while ago   不久之前
  afterwards   然后,后来地          shortly afterwards  不久以后  
  battered     击碎的,撞坏的        battle              作战,战斗
  fright           惊骇,吃惊               rate on equity      资本收益率
  regret         后悔，遗憾             money-earning performance 盈利率 

Pattern:
  The girl acted as our tour guide.      //担当
  He acted his part very well.           //扮演
  Think before u act.                           //行动
  Donot shout at me.         at               //对着
  The boy threw a stone at the bird.     //向着
  He is far more clever than u think.    //far修饰比较级
  This is a far better idea.               

Syntax:
   see sb. doing sth.
   I saw some children playing games in the park.
   不定式省略to  
   He saw the ball fly straight towards the man in the boat.
  such(+名词)/so(+adj.)....that....... 
  It's such a wonderful experience that I will never forget it.
  After u did such a bad thing,do u think u can get away with that?