新人教版高中英语选修2Unit 1 Science and Scientists-Discovering useful structures教学设计（精美版）

3．Points that we should pay attention to:(1) The difference of “that” and “what”.that引导表语从句时，是连词，在从句中不作成分；what是连接代词，引导表语从句时，在从句中作主语、宾语、表语或定语。That was what she did this morning on her way to school.那就是她今天早晨在去学校的路上做过的事。My opinion is that we should communicate with parents frequently.我的意见是我们应该经常和父母沟通。(2)because与why的区别because引导表语从句时强调原因，why引导表语从句时强调结果。She often comes late. That's because she has a baby to take care of.她经常迟到。那是因为她有一个孩子要照顾。She has a baby to take care of. That's why she often comes late.她有一个孩子要照顾。那就是她经常迟到的原因。[点睛]　名词reason作主语时，后面的表语从句表示原因时要用that引导，而不用because。(3) The subjunctive mood used in predicative clauses①在表示建议、劝告、命令等含义的名词后的表语从句中，谓语动词用“should＋动词原形”，should可以省略。My suggestion is that we (should) have a discussion about this matter instead of just laying it aside.我的建议是我们应当讨论一下这件事，而不应该只是把它放在一边。