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英语三大从句
复合句
【语法要点】
复合句是由一个主句加一个或几个从句所构成的句子。从句只用作句子的一个成分,不能独立。根据从句在句子中的作用,可分为名词性从句、定语从句和状语从句三类。
(一)名词性从句
名词性从句包括主语从句、表语从句、宾语从句、同位语从句。其关联词有连接词that、if、whether;
疑问代词who、what、which和疑问副词whe
、where、how、why等。
1名词性从句句法结构:


Thathewillcomeiscertai
(that不可省)
属连
语从
Whethersheiscomi
gor
otdoes
’tmattertoomuch

(不能用if)

thatwhether
宾语从
Ithi
k(that)hewillbeallrighti
afewdaysIwe
ti
a
daskedif(whether)theyhadacheapsuit

Iwo
derwhether(不能用if)itistrueor
ot


Thefactis(that)Ihave
everbee
there
从句
Thequestio
iswhether(不能用if)itisworthdoi
g
连接代词
thatwhowhomwhosewhich

位语
Thefactthatshehad
otsaida
ythi
gsurprisedallofus

Theyaskedmethequestio
whethertheworkwasworthdoi
g

主语
Whowillhelphimis
otk
ow


Whathesaidisveryimporta
t

Whichsidewillwi
is
otclear
(1)作及物动词的宾语。例如:
Ireallydo
’tk
owwhatheisdoi
g

Doyouk
owwhowhomtheyarewaiti
gfor

Heaskedwhosedictio
aryitwas
从句
Heca
’ttellwhichmethodtheywillusefortheexperime
t
(2)作介词的宾语。例如:
Payatte
tio
towhattheteachersaidIwo
deredtowhomhehadgive
theletter

Thatiswhatheisworriedabout


Thequestio
iswhowillcomehere

Thequestio
iswhichteamwillwi
thematch
f英语三大从句
连接副词
wherewhe
whyhow

Whereshehasgo
eis
otk
ow
yet
语从
Whe
theywillstartis
otk
ow
yet

Whyhediditwas
’tquiteclear
Howhebecameagreatscie
tistisk
ow
tousall

Ido
’tk
owwherewearegoi
gtohavethemeeti
g
语从
Pleasetellmewhe
weshalldiscussourworkpla


Doyouk
owwhyhesaidthat
WillyoutellmehowIca
gettotherailwaystatio


Thatiswherehewasbor

语从
Thisiswhyheislate

Thisishowhedidit
Thequestio
iswhe
hewillbeback


Ihave
oideawhe
hewillcomeback
语从
Youhave
oideahowworriedIwas

Theproblemiswhereweca
getsomuchmo
ey
2名词性从句的其它用法:1)if不能引导表语从句。连接代词who、what、whose、which不能引导同位语从句。2)有时as、asifthough、because也可以引导表语从句,能跟表语从句的谓语动词一般为系动
词be、seem、look等。例如:Thi
gsare
otalwaysastheyseemtobe事情并不总是像表面上看来的那样。
Itlr
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