title: 两个词组的区别请问beafraidtodo和　　beafraid 
desc: 请问
  
  be afraid to do    和　　be afraid of dng
  
  有什么不同？
answer: be afraid to do　不敢，胆怯去做某事，是主观上的原因不去做，意为"怕"“不敢（做）......”；
  be afraid of doing　担心出现doing的状况、结果。 doing 是客观上造成的，意为"生怕，恐怕"，“害怕（会做）.....”
  
  I am afraid to run the risk.（我不敢冒险。）
                      I am afraid of running the risk.（我害怕会冒风险。）
  
  
  She was afraid to step further in grass because she was afraid of being bitten by a snake.
  她生怕被蛇咬着，而不敢在草丛中再走一步。
  She was afraid to wake her husband.
  她不敢去叫醒她丈夫。
  She was afraid of waking her husband.
  她生怕吵醒她丈夫。
  