4）.注意宾语从句中的时态呼应，当主句动词是现在时，从句根据自身的句子情况，而使用不同时态。
例如：
HestudiesEnglisheveryday.（从句用一般现在时）
HestudiedEnglishlastterm.（从句用一般过去时）
Iknow（that）hewillstudyEnglishnextyear.（从句用一般将来时）
HehasstudiedEnglishsince1998.（从句用现在完成时）
当主句动词是过去时态（could,would除外），从句则要用相应的过去时态，如一般过去时，过去进行时，过去将来时等；当从句表示的是客观真理，科学原理，自然现象，则从句仍用现在时态。
例如：
TheteachertoldusthatTomhadleftusforAmerica．
TheteachertoldusthatTomisaboy.
5）.think,believe,imagine,suppose等等动词引起的否定性宾语从句中，要把上述主句中的动词变为否定式。
即将从句中的否定形式移到主句中（否定转移）。
例如：
Wedon’tthinkyouarehere.我们认为你不在这。
Idon’tbelievehewilldoso.我相信他不会这样做。
3.表语从句
在句中作表语的从句叫表语从句。
引导表语从句的引导词与引导主语从句的引导词大致一样，表语从句位于系动词后，有时也可用asif引导。
其基本结构为：
主语+系动词+引导词+从句。
例如：
Thefactisthatwehavelostthegame.事实是我们已经输了这场比赛。
Thatiswhyhedidn’tcometothemeeting.那就是他为什么不到会的原因。
Itlooksasifitisgoingtorain.看上去天要下雨了。
需要注意的，当主语是reason时，表语从句要用that引导而不是because。
例如：
Thereasonwhyhewaslatewasthathemissedthetrainbyoneminutethismorning
4.同位语从句
说明其前面的名词的具体内容的从句是同位语从句。
同位语从句通常由that引导，可用于同位语从句的名词有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等。
例如：
Thenewsthatwewonthegameisexciting.我们赢得这场比赛的消息令人激动。
ThethoughtcametohimthatMaryhadprobablyfallenill.他想到可能玛丽生病了。
同位语从句和定语从句的区别：
同位语从句所修饰的词是有限的一些抽象名词，而定语从句就没有这种限制。
that作为关系代词，可以引导定语从句，充当句子成分，在从句中作宾语时可以省略；that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。
试比较下面两个例句:
Ihadnoideathatyouwerehere．（that引导同位语从句，不能省略）
Haveyougottheidea（that）thisbookgivesyouoflifeinancientGreece？
（that引导定语从句，作宾语，可以省略）
名词性从句专项练习100题
1.Hissuccesswasbecauseof________hehadbeenworkinghard.
A.thatB.thefactwhichC.thefactthatD.thefact
2.“IsMaryfromNewYorkCity”“Idon'tknow_______.”
A.fromwhatcitydoesshecomefromB.fromwhatcityshecome
C.whatcitydoesshecomefromD.whatcityshecomesfrom
3.________makesmistakesmustcorrectthem.
A.WhatB.ThatC.WhoeverD.Whatever
4.ThereasonwhyIdidn'tgotoShanghaiwas________anewjob.
A.becauseIgotB.becauseofgettingC.IgotD.thatIgot
5.Itworriedherabit____herhairwasturninggrey.
A.whileB.thatC.ifD.for
6.Henrykilledthedog.I'llaskhimwhy________.
A.didhedothatB.hedidthatC.hedidD.hehasdoneso
7.HaveyouseenHenrylatelyMybosswantstoknow________.
A.howheisgettingalongB.howishegettingalong
C.whatheisgettingalongD.whatishegettingalong
8.Itisgenerallyconsideredunwisetogiveachild____heorshewants.
A.howeverB.whateverC.whicheverD.whenever
9.Heaskedme________withme.
A.whatisthetroubleB.whatwrongwas
C.whatwasthematterD.whattroubleitis
10.Iamsure________hesaidistrue.
A.thatB.aboutthatC.ofthatD.thatwhat
11.Whenandwhyhecamehere________yet.
A.isnotknownB.arenotknownC.hasnotknownD.havenotbee
12.Iwonderhowmuch________.
A.doesthewatchcostB.didthewatchcost
C.thewatchcostedD.thewatchcosts
13.Maryis________someonemightrecognizeher.
A.afraidofB.afraidaboutC.afraidthatD.afraidfor
14.________isnoreasonfordismissingher.
A.BecauseshewasafewminuteslateB.Owingtoafewminuteslate
C.ThefactthatshewasafewminuteslateD.Beingafewminuteslate
15.Theycametotheconclusion________byacomputer.
A.thatnotallthingscanbedoneB.becauseofnotallthingsbedone
C.beingnotallthingscanbedoneD.becausenotallthingscanbedone
16.Whytheexplosionoccurredwas________thelaboratoryattendanthadbeencareless.
A.forB.becauseC.sinceD.that
17.Idon'tdoubt________he'llcome.
A.thatB.ifC.whatD.whether
18.—“Whydidyougotothewrongclass,Mr.Wang”
—“Well,Iforget_______Iwassupposedtogoto.”
A.whichtheroomB.whichroomC.whatwastheroomD.whatroomwasit
19.Outputisnowsixtimes________itwasbeforeliberation.
A.thatB.whichC.whatD.ofwhich
20.Mary:
Helenisamerewasherwoman,yetshe'snowbuyingabighouse.
Carol:
Yes.Becauseshe'salwayssaved________.
A.whatlittlesheearnsB.howlittlesheearns
C.forlittlesheearnsD.withlittlesheearns
21.______surprisedmemostwas______suchalittleboyofsevencouldplaytheviolinsowell.
A.That…whatB.What…thatC.That…whichD.What…which
22.Wegavehim________helpwecould.
A.whichB.whatC.thatD.this
23.Sheispleasedwithwhatyouhavegivenhimand________youhavetoldhim.
A.thatB.whichC.allwhatD.allthat
24.Excusemewouldyoupleasetellme________
A.whenthesportsmeetistakenplaceB.whenisthesportsmeetgoingtobeheld
C.whenisthesportsmeettobeginD.whenthesportsmeetistotakeplace
25.Doyouhappentoknow________
A.whatsizeshoeshewearsB.howbigshoeshewears
C.whatisthesizeofhisshoesD.whatnumbershoesarehis
26.Thisbookwillshowyou________canbeusedinothercontexts.
A.howyouhaveobservedB.howwhatyouhaveobserved
C.thatyouhaveobservedD.howthatyouhaveobserved
27.Wheredoyouthink________
A.hashegoneB.hashebeenC.he'sgoneD.washe
28.Doyouknow________
A.howmanypopulationsthereareintheworld
B.howmuchpopulationthereisintheworld
C.howmanythepopulationoftheworldis
D.whatthepopulationoftheworldis
29.Wouldyougoandsee________outside
A.whattotakeplaceB.whatTomhashappened
C.whatishappeningD.whatthematterhadbeen
30.Thesubjectof"WhatisinterestingisthatIdonotevenknowhim."is_______.
A.whatB.interestingC.WhatisinterestingD.I
31.________IthinkheisCharles.
A.WhodoyouthinkheisB.Doyouthinkwhoheis
C.WhomdoyouthinkheisD.Doyouthinkwhoheis
32.Hedidn'tknowwhichroom________.
A.theylivedB.theylivedinC.didtheyliveD.didtheylivein
33.Thelittleboyate________hismothergavehim.
A.thatB.whichC.whateverD.nomatterwhat
34.Thecityisnolonger________.
A.whatitisB.thatitusedtobeC.whichitwasD.whatitusedtobe
35.Myparentsused________theyhadtogetanewcarforme.
A.whichB.thatC.whatD.allwhat
36.________wegoswimmingeveryday________usalotofgood.
A.If…doB.That…doC.If…doesD.That…does
37.________was
升级会员 