use to 用法

sentence:
  If only I could fly./I'll be right there./I'll see u at six.
  Knowledge is power./Just read it for me./Is it true or false?
  This milk has gone bad./Donnot beat around the bush.

key words and expressions:
  thunderstorm  雷暴                  Bible         圣经
  workshop      工作间,车间     grandson      孙子
  helper           助手                      retire        退休,撤退
  palace        宫殿                     Summer Palace 颐和园
  disaster      灾难,天灾             bicycle       脚踏车
  save up       储蓄,贮存            save          积蓄
  used to       惯常,惯于            bush          矮树丛
  of one's own  属于自己的      energy        精力,活力
  spirit        精神,勇气               artist        艺术家,画家
  recall        回忆,召回               at that time  在那时
  in his early thirties  三十出头    in her later fifties   年近六十  
  in his twenties    在他二十多岁时
 
Pattern:
  It's my wish to become an artist.   --形式主语
  It's a great pleasure to talk to u.  
  She is saving up for holidays.
  Let's take a taxi to save time.
  Save your breath,he won't listen to u.

Syntax:
  used to do..   过去经常做,而现在已经停止,不再重复的动作
  I used to cook my own meals every day but now I often eat out.
  Did u use to see each other a lot?
  of one's own 属于自己的
  Finally I have got a flat of my own.
  They started a business of their own.