二、教学重难点1. 教学重点:过去完成时的用法。2. 教学难点:用过去完成时叙述过去的事件。三、教学过程Ⅰ. Warm-upGreeting.Ⅱ. Lead-inDo you remember any unexpected situation in your daily life?展示几张尴尬的人的图片。Ask: What do you think of the people in these pictures?Ss: They look scared/bad.T: What happened to the boy?Ss: He broke his arm. He is getting an electric shock.T: I was late for work today. When I got up, I found my clock had rung. It was 7:30.By the time I went to the bathroom, my son had been in. So I had to wait. When I went out, I found my motorbike had broken down. (老师讲述自己迟到的经历,激起学生对一下内容的学习)。