语 境 自 主 领 悟
先观察原句
后自主感悟
1.In 1996 , I moved to Canada with my husband and I have been living there since then.
2.Liu Fang has been playing the pipa for the last three hours.
3.She's been performing concerts every day since last month.
4.They have known each other since childhood.
5.I have traveled to most of the cities in China since five years ago.
1.句1、句2和句3用了现在完成进行时；句4和句5用了现在完成时。
2.由左栏各句可知，现在完成进行时的构成为：have/has＋been＋动词的现在分词形式；现在完成时的构成为：have/has＋动词的过去分词形式。
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