语法自己做笔记背-名词性从句

在句子中起名词作用的句子主语从句、宾语从句、表语从句和同位语从句引导名词性从句的连接词可分为三类1.连词：that

(无任何词意)；whether，if（均表示“是否”，表明从句内容的不确定性）；asif

/as

though

(均表示“好像”，

似乎”)。以上连词在从句中只起引导作用，不充当任何成分。a)

Thatb)whether

or

not(

=if)whether不能被if取代Whether引导主语从句并在句首；引导表语从句；whether从句作介词宾语；从句后有or

notWhetherornot2.连接代词:what,whatever,who,whoever,whom,whose,

which,

whichever,

whomever以上连接代词在从句中充当主语、宾语、表语，whose在从句中充当定语成分。a)whob)whosec)

Whichd)whate)whatwhat：疑问意义和关系意义①疑问意义什么②关系意义…东西当what表示关系意义时，可以解释为the

thingwhich或all

thata)whatb)

What

(

=

the

thing

which)c)what

(all

that)who只具有疑问意义其关系意义要通过

whoever(主格)/whomever(宾格)those

who…a)whob)whoeverc)whomeverWhat是连接代词，在从句中充当一个名词性成分that是连接词，在从句中不充当成分a)whatb)that3.连接副词：when，where，how，why，除起连接作用外，还充当状语，分别表示时间、地点、方式和原因状语。例如：a)

How

we

can increaseour

production

remains

aproblem.（引导主语从句，作方式状语）如何才能提高生产仍然是个问题。b)whyc)

Whend)where语序要用陈述语序1.

What

hehas

found2.that

he

missed

theearly

bus3.whoever

needshelp介词后引导名词性从句的连词；引导主语从句和同位语从句的连词不可省略1.

That

she

was

chosen2.that

our

team

had

won主语从句1.

Whether

he

will

be

able

to

comeWho

will

win

thematchWhere

the

English

evening

will

be

held主语从句后的谓语动词一般用单数形式It+be+名词+that从句:1.It

is

commonknowledge

that

…

……是2.

It

is

a

surprise

that

…令人惊奇的是……3.

It

is

a

fact

that…事实是……It

is

necessary

that

…It

is

important

that

…It

is

obvious

that

…It

is

believed

that

…It

is

knownto

allthat

…It

has

been

decided

that

…It

appears

that

…It

happens

that

…It

occurred

to

me

that

…在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气(should)+do1.2.3.that在句中不担任任何成分，在口语或非正式的文体中常被省去，但如果从句是并列句时，第二个分句前的that不可省(should)+动词1.

insist(should)

do2.suggest(sh