12.29 Lesson 65

• 生词

  versus prep 对
  circus 马戏团
  present 礼物
  approach 走近
  ought 应该
  weigh 重
  fortunate. 幸运的
  arrest. 逮捕

• 短语

  dress up. 装扮
  set off. 沿着
  should have done. 本应该做
  ought to. 本应该做
  have to = have got to.

• 语法

  must 现在，将来，不能用过去
  现在分词做伴随状语: 一个主语发出两个动作
  一个主要动作，一个次要伴随动作
  He said it angrily pointing at the notice on the wall.
They stood there for an hour watching the game.
She sat at the desk reading a newspaper
Following the guide, they started to climb.
  现在分词做时间状语
  One day, while walking along the sands towards his boat, Crusoe saw the mark of a man's foot in the sand.
Hearing the news, they all jumped with joy.
  现在分词做目的状语
  The six blind(盲人) men stood there begging for a meal.(=in order to beg for a meal.)
  现在分词做结果状语
  Her husband died ten years ago, leaving her with three children to look after.
  现在分词做原因状语
  Being sick, I stayed at home.
Not knowing her address, I can't write to her.
   
  should have done. 过去本该做而没做.
  should not have done. 过去本不该做，但做了
  ought to have done. 过去本该做而没做
  ought not to have done. 过去本不该做，但做了

• 课堂练习

  他坐在扶手椅里读报。
  He sat in the armchair reading a newspaper.
  你该事先告诉我你要来
  You should have told me you were coming.
  我们真应该买大号的
  We really should have bought the large size.
  你本应该听从医生的劝告.
  You ought to have accepted the doctor's advice.