2019学年度外研版选修八Module5SectionⅢGrammar阅读学案设计

　　　　　[语法初识]

原句感知 自主探究 ①What we find out from space research is important for us on Earth.

②It's well­known that the ancient Chinese invented the rocket.

③We think it probable that he is dead.

④The teacher showed us the controls of the spacecraft and explained how gravity worked.

⑤They insisted that everyone (should) come to the party.

⑥The proposal that we (should) import more equipment from abroad is to be discussed at the meeting.

⑦I have no idea when she will be back.

⑧The question remains whether they will be able to help us.

⑨The problem is who we can get to replace her. (1)句①②为主语从句，句③④⑤为宾语从句，句⑥⑦为同位语从句，句⑧⑨为表语从句。

(2)句①⑨中的引导词为连接代词，句④⑦中的引导词为连接副词。

(3)句②③中使用了it作形式主语或形式宾语，而真正的主语从句或宾语从句后置。

(4)句⑤中的that可省略，其他句中的that一般不可省略。

(5)句⑤⑥中的从句使用了虚拟语气。 　　

　　[语法剖析]

　　名词性从句在功能上相当于名词，可作主语、宾语、表语和同位语。因此名词性从句可分别称为主语从句、宾语从句、表语从句和同位语从句。名词性从句必须使用陈述语序，即"主语＋谓语"的语序。引导名词性从句的连接词可分为三类：连接词：that, whether, if(不充当从句的任何成分)；连接代词：what, whatever, who, whoever, whom, whose, which, whichever；连接副词：when, where, how, why。

　　1．引导词的选用

　　(1)that和what的选用

　　that和what都可引导主语从句。what除起连接作用外，还可在从句中作主语、宾语、定语和表语。that 只起连接作用，在从句中不充当任何成分。

　　That she became an artist was due to her father's influence.

　　她成为画家是受了她父亲的影响。

　　What we will do tomorrow depends on the weather.

　　明天我们做什么得看天气。

　　(2)whether和if的选用

　　whether引导的主语从句可位于复合句的句首； if引导主语从句时，只能用it作形式主语，而把从句后置。

　　Whether it will do us harm remains to be seen.

　　它是否对我们有害还有待观察。

It is still in doubt if the plan will be carried out.