【同课异构】2018-2019学年人教版高中英语选修8课件:Unit 5《Section Two Learning about language》
【同课异构】2018-2019学年人教版高中英语选修8课件:Unit 5《Section Two Learning about language》第5页

 Present Perfect Continuous Tense 现在完成进行时: 基本用法 1) 强调时间的持续性。如: 电话响了差不多一分钟, 为什么没人接? The telephone has been ringing for almost a minute. Why doesn’t someone answer it?