单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Unit 2Grammar and usage (2)Preparatory subject itTeaching aims Learn the preparatory subject it. 2. Use preparatory subject it freely. It 用作形式主语 当不定式(短语)动名词(短语)

单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Grammar and usageAttributive ClauseHarry Pottera boy with glassesa boy who is brave and wearing glassesa brave boyAttribute定语 1 概念Definition：定语从句 在复合句中用来修饰某一个名词代词的从

单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Grammar and usageUnit3Verb-ed formGrammar and usage过去分词：done1 做定语复习现在分词a speech containing two parts= a speech two partswhichcontains现在分词短

单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Grammar and usageUnit 3Past perfect tense过去完成时Past perfect tenseBy the 1920s he an explorer searching for the …He money