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2014-2015学年高一下学期英语必修三unit3语法姓名：______________ 成绩：_______________名词性从句（一）名词性从句的种类在句子中起名词作用的句子叫名词性从句。
名词从句的功能相当于名词词组, 它在复合句中能充当主语、宾语、介词宾语、表语、同位语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
（一）引导名词性从句的连接词1、连接代词：who, whose, whom, what, which2、连接副词：when, where, why, how3、连接词：that, whether, if, as if注意：连接代词与连接副词在句中不再是疑问句，因而从句中谓语不用疑问式。
连接代词与连接副词在从句充当句子成分，连接词whether 和if（是否），as if（好象）在从句中不充当句子成分，只起连接作用。
根据句义，如果连接代词与连接副词，whether、if 和as if都用不上时，才用that作连接词（that本身无任何含义）。
（二）主语从句1、主语从句在复合句作主语。
e.g. Who will go is not important.2、用it作形式主语，主语从句放在句末。
e.g. It doesn’t matter so much whether you will come or not.3、that引导主语从句时，不能省略。
e.g. That he suddenly fell ill last week made us surprised.（三）表语从句1、表语从句在复合句中作表语，位于系动词之后。
e.g. The question was who could go there.2、引导表语从句的连接词that有时可省去。
e.g. My idea is (that) we can get there on time（四）宾语从句1、宾语从句在复合句中作宾语。
名词性从句1.从属连词（3个）：that,whether,if（不充当成分）连接词 2.连接代词（8个）：what(ever),which(ever),who(ever),whom(ever)(充当主语、宾语、表语、定语) 3.连接副词（4个）：when,where,who,why（充当状语）主语从句 1.句首：e.g.What he said is ture.①It + be + adj.（possible,necessary...） + that②It + be + 名词词组（a pity,no wonder...）+ tha t2.it作形式主语，从句位于句末③It + be + 过去分词（said,reported...）+that（5种）④It + vi.（happen,seem...）+that⑤It + vt. + 宾语 + that e.g.It worries her a bitthat...二、宾语从句 1.vt.之后：e.g.I don’t know what he said.2.prep.之后：e.g.It depends on whether they will support us.3.adj.之后：e.g.I’m sorry/glad/afraid/surprised that...4.it作形式宾语，从句置于句末：e.g.He made it clear that he wouldn’tchange his mind.三、表语从句 1.be动词之后：e.g.It is because....2.感官动词（look,sound,feel...）之后：e.g.It looks as if it is going to rain.四、同位语从句：名词之后 1.直接位于名词之后：e.g.The fact that our team won the gamesurprised us.2.被其他成分分开：e.g.Word came that our team won the going. If/whether区别：①引导主语从句且置于句首，只能用whether。
