替代词
常考的替代词有：it/one/that;so/not;do/did/does等。
1.??????it指上文的可数名词和不可数名词，且是同名同物，可人可物；one指上文提到的某人或某物中的任何一个，即同名异物。相当于“a+名词”表泛指。代可数名词。
①????Weneededanewcupboardforthekitchen.Sopetermadeonefromsomewoodweneed.(one=acupboard)
②????Meetingmyuncleafteralltheseyearswasanunforgettablemoment,oneIwillalwaystreasure.(one=amoment)
③????TheParkersboughtanewhousebutitwillneedalotofbookbeforetheycanmovein.(it=thehouse)
2.??????that代替前面提到的同名异物中特指的事物。名词是可数或不可数（that=theone;that=the+不可数名词）前无修饰语（one有），但必须有后置定语。
①???????TheEnglishspokenintheUnitedStatesisonlyslightlydifferentfromthatspokeninEngland.?(that=theEnglish)
②???????Thiscoatisnotsogoodasthatweboughtyesterday.(that=theone)
3.??????so/not常与臆猜的动词连用：think,hope,believe,expect,imagine,suppose.
---Willshecometomorrow?
----Iexpect/think/hopeso.
??Iexpect/think/hopenot.(Idon’texpect/thinkso)(hope,fear,guess,beafraid不用否定前移)
4.do/did/does
?①Thestudentspentasmuchtimegettingtrainedastheydidstudying.
?②---DoyouknowwhatTomedoesallday?
----IknowhespendsatleastasmuchtimewatchingTVashedoesdoinghislessons.
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