A son and his father were walking on the mountains. Suddenly, the son falls, hurts himself and screams, "AAAhhhh!!!"To his surprise, he hears the voice repeating, somewhere in the mountain," AAAhhhh!!!" Curious, he yells," Who are you?" He receives the answer,"Who are you?" Angered at the response, he scream,"Coward!" He receives the answer,"Coward!"
He looks to his father and asks,"What's going on?" The father smiles and says,"My son, pay attention." And then he screams to the mountain, "I admire you!" The voice answers," I admire you!" Again the man screams,"You are a champion!" The voice answers,"You are a champion!" The boy is surprised, but does not understand.
Then the father explains,"People call this ECHO, but really this is LIFE. It gives you back everything you say or do. Our life is simply a reflection of our actions. If you want more love in the world, create more love in your heart. If you want more competence in you team, improve your competence. This relationship applies to everything, in all aspects of life. Life will give you back everything you have given to it."
两者都可以表示“从过去开始一直持续到现在”，在含义上如着重表示动作的结果
时，多用现在完成时，如着重表示动作一直在进行，即动作的延续性时，则多用
现在完成进行时。一般不能用于进行时的动词也不能用于现在完成进行时。
I have read that book.我读过那本书了。
I have been reading that book all the morning. 我早上一直在读那本书。
