语法重点：过去完成时态（二）
难点突破：过去完成时态与一般过去时态等时态的区别
知识目标：通过操练、专项练习等方式复习“过去完成时态”结构以达到熟练运用的目的
复习步骤设计：
（一）词汇复习Revision of the words and phrases learnt in Unit Fifteen, dictation of some main words and phrases learnt in this unit（此环节也可根据中考词汇表顺序进行听写检查）。
（二）对话操练（Dialogue Acting—ask Ss to act out some dialogues about How long had Mr Li taught in this s chool before he came here?/ How many times had you been to Washington by last year ? etc.（此环节也可以采取学生达标积分制进行，即复习阶段课前对话必须人人参与）
