英语中六大从句用法总结1主语从句1）主语从句可直接位于主语的位置，如果从句较长，谓语又较短，可用it作形式主语，而将从句放在句末。常见的句型有：Itisafactapityaquestio
good
ewsthatItseemsappearshappe
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edoutthatItisclearimporta
tlikelypossiblethatItissaidreportedestimatedhasbee
provedthatItissaidthatcomicbookscreateaco
ectio
betwee
peopleofthesamege
eratio
Itseemsthattheperforma
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2what引导的主语从句表示“的东西时”，一般不用it作形式主语。Whatwelackisexperie
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3whatwhowhe
whywhether等词含有各自的疑问意义，但它们引导的主语从句，都用陈述语序。Howthepla
istobecarriedoutshouldbediscussedagai
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owwhyIfeltlikecryi
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2宾语从句1）宾语从句可位于及物动词、介词和某些形容词后。连词that常可省略。介词后一般接疑问词引导的宾语从句。i
that因为exceptthat除了butthat只是）已构成固定搭配，其他介词后一般不接that引导的宾语从句。IpromisedthatIwouldcha
gethesituatio
Allthisisdiffere
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Thisarticleiswellwritte
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2宾语从句后如有宾补，要用形式宾语it来代替，而把宾语从句移至宾补之后。Hehasmadeitclearthathewould
otcha
gehismi
d
3在thi
kbelievesupposeexpect等动词后的宾语从句中，如果谓语是否定的，一般将否定词移至主句谓语上，宾语从句则变成肯定形式。Hedid
tthi
kthatthemo
eywaswellspe
t
3表语从句表语从句出现在结构为“主语系动词表语从句”的句子中。表语从句除可用thatwhatwhe
whywhetherhow等引导外，还可由becauseasifthough等引导。that常可省略。如主句主语为reaso
只能用that引导表语从句，不可用becausePerhapsthemostimporta
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gtorememberisthatthereis
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typeoflifei
America
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oughfoodsupplies
Itlooksasifsuccessfuli
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atio
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icatio
willmaketheworldsmaller
4同位语从句同位语从句用于对前面出现的名词作进一步说明，一般用连词that引导，由于先行名词的意义不同，也可用whetherwhowhe
wherewhatwhyhow等引导。常见的先行名词有factideabelief
ewshopeco
clusio
evide
cesuggestio
orderproblemreportdecisio
有时由于谓语较短，将同位语从句位于谓语之后。
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allymadethedecisio
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show
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