it，one，ones，that，those可以用來代替上文中提到的名詞，以避免重復。1.it

1)代替上文提到的名詞，指代同一事物(同名同物)，不能帶修飾語：

---Doyouwantthemagazine?---Yes，Iwantit.Idon'twanttodrinkthetea．Itistoohot．2)it用作人稱代詞時，可指已知的或暗含的事實或情況，或用作形式主語/賓語，也可替代性別不明的嬰兒。Oncethesupermarketcloses,itwillmeanthat200workerswillbelaidoff.1.Itwouldbeapitytomissit.Itisnotworthgettingupset.Ifinditdifficulttotalktoyouaboutanythingserious.Shethoughtitawasteoftimearguingwithhim.Georgemadeitclearthathedisagreed.

2.one

1）代替上文中出現(xiàn)過的單數(shù)可數(shù)名詞，表泛指（同類但不是同一）,前面可以有冠詞或形容詞，也可以有this或that或another，但前不能有物主代詞：Ihave1ostmypen．I’mgoingtobuyone.Thispendoesn’twork.Imustbuyanotherone.Ipreferthisonetothatone.2.比較：I’mlookingforaflat.I’dlikeasmallonewithagarden.I’mlookingforaflat.I’dlikeonewithagarden.（不能說：...aonewithagarden.）2）one作為不定人稱代詞,可泛指“任何一個人”，有one‘s

和oneself形式。Onehastotakecareofoneselfandone'sfamilyifhecan.3．ones是one的復數(shù)形式，常用來代替復數(shù)可數(shù)名詞，表泛指.

Ihaveanewcoatandseveraloldones.Theseyellowovercoatsaresosmall.Iwantthosegreenones.3.4theone替代表特指的單數(shù)名詞：Herearesixrings.Pickouttheoneyoulikebest.Yourdictionaryismoreusefulthantheonemyunclegaveme.5theones替代表特指的復數(shù)名詞：Don’tbuytheexpensiveapples;getthecheaperones.I’dliketotryonthoseshoes，theonesnearthewindow.6．that用來代替上下文中的名詞，它表示與前面同類不同一的東西。that既可代替不可數(shù)名詞，又可代替單數(shù)可數(shù)名詞，其后總有后置定語，一般不指人：4.Lifeinthecountrysideseemsmoreexcitingthanthatintown.I'mmovingtothecountrysidebecausetheairthereismuchfresherthanthatinthecity.注意：that指代可數(shù)名詞時，that相當于theone,若后置定語為of引起的介詞短語，則通常用that。

Myroomisbetterthanthat/theone

nextdoor.Thepriceofwheatishigherthanthatofrice.ThepopulationofChinaislargerthanthatofJapan.5.7．those是that的復數(shù)形式，可用來替代可數(shù)名詞的復數(shù)形式，表示特指;有時theones和those可互換使用，常有后置定語：Thestudentsinourclassworkharderthanthoseintheirclass.Thebookismoredifficultthanthosewehavereadbefore.Studentswhodowellinexaminationsarethose［theones］

wholiketoaskquestionsinclass.6.1.Ilike_______intheautumnwhentheweatherisclearandbright.A.thisB.that C.it D.one2.---Doyoulike______here?---Oh,yes.Theair,theweather,thewayoflife.Everythingissonice.A.thisB.these C.that D.it3.I’mreadinganewbookthesedays,_____inEnglish.it B.that C.one D.which

4.Mr.Greengavethetextbookstoallthepupilsexcept_____whohadalreadytakenthem.A.one B.theones C.some D.theothersCCDB7.5.—Haveyoueverseenasnakealive?—Yes,I’veseen_____.A.that B.so C.one D.it6.Ipreferastreetinasmalltownto_____insuchalargecityasShanghai.A.that B.it C.this D.one7.Meetingmyuncleafteralltheseyearswasanunforgettablemoment，____Iwillalwaystreasure.A.that

B.one

C.it