Section_ⅢGrammar-_复习名词性从句

　　语法图解

　　探究发现

　　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.

　　[我的发现]

　　(1)①②句为主语从句，③④⑤句为宾语从句，⑥⑦句为同位语从句，⑧⑨句为表语从句。

　　(2)②③⑤⑥⑧句中的引导词只起连接作用，在从句中不作成分，①⑨句中的引导词为连接代词，④⑦句中的引导词为连接副词。

　　(3)②③句中使用了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)⑤句中的that可省略，其他句中的that一般不可省略。

　　(5)⑤⑥句中的从句使用了虚拟语气。

　　名词性从句包括主语从句、表语从句、宾语从句和同位语从句。

　　一、名词性从句的连接词

　　1．that

(1)that只起连接词作用，引导名词性从句，在从句中不作任何成分，本身也没有词义。