if和whether的區(qū)別含講解+習(xí)題+答案

1、If和whether的區(qū)別if和whether都可譯為“是否“二者引導(dǎo)賓語(yǔ)從句時(shí)通?？梢曰ハ嗵鎿Q口語(yǔ)中多用if代替whether.例如：Askifwhetherheplanstocometothemeeting.而以下幾種情況中只能用whether:1.強(qiáng)調(diào)兩方面的選擇特別是句中有not時(shí).如：Letmeknowwhetheryoucancomenot.2.賓語(yǔ)從句前置時(shí).如：WhetherthisistrueIcantsay.3.引導(dǎo)

2、主語(yǔ)、表語(yǔ)、同位語(yǔ)從句時(shí).如：Whetherthefootballgamewillbeplayeddependsontheweather.（主語(yǔ)從句）Thequestioniswhetherhecandoit.（表語(yǔ)從句）Thequestionwhetherweshouldgowiththemmustbedecidedatonce.（同位語(yǔ)從句）4.在介詞之后作介詞的賓語(yǔ)時(shí).如：Ihaventsettledthequestionofwh

3、etherIllgobackhome.5.在不定式前與不定式一起組成詞組時(shí).如：Whethertogostayisstillaquestion.6.在discussdecide等動(dòng)詞后作賓語(yǔ)時(shí).如：Wediscussedwhetherweshouldgotherebyplane.值得注意的是：if還可以引導(dǎo)條件狀語(yǔ)從句是“假如；如果“之意而whether可以引導(dǎo)讓步狀語(yǔ)從句是“不管；無(wú)論“之意.如：Ifyouaskhimhewillhe

4、lpyou.Ishallgowhetheryoucomewithmestayathome.一、if或whether引導(dǎo)賓語(yǔ)從句時(shí)作“是否”講常放在動(dòng)詞ask、see、say、know和findout等后面.一般情況下兩者?？蓳Q用在口語(yǔ)中多用if.如：例1Nobodyknowswhether(if)itwillraintomrow.沒(méi)有人知道明天是否下雨.例2Lucyaskedwhether(if)theyhadacottonsweate

5、r.露西問(wèn)他們是否有棉制的羊毛衣.二、if或whether引導(dǎo)賓語(yǔ)從句時(shí)要注意三個(gè)方面即連詞、語(yǔ)序和時(shí)態(tài).1if或whether不能和that或其它連詞（副詞）同時(shí)使用也不能省去.如：例3我不知道他今天是否會(huì)來(lái).[誤]Idon’tknowthatif(whether)hewillcomeheretoday.[正]Idon’tknowif(whether)hewillcomeheretoday.例4他走過(guò)來(lái)看看貓是否出了毛病.誤]Heca

6、metoseewhatif(whether)therewaswrongwithhiscat.[正]Hecametoseeif(whether)therewaswrongwithhiscat.2if或whether引導(dǎo)的賓語(yǔ)從句時(shí)雖具有疑問(wèn)意義但從句語(yǔ)序應(yīng)用陳述句語(yǔ)序.如：例5DidyouknowthewaytothehospitalTheoldwomanaskedme.Theoldwomanaskedme.if(whether)Ikne

7、wthewaytothehospital.老婦人問(wèn)我是否知道去醫(yī)院的路.12)Itisunknown_________hewillcome.13)Idontknow_________theywillcometohelpus.14)Iamnotcertain___________thetrainwillarriveontime.15)____________thenewsistrueremainsaquestion.16)Whatwewa

8、nttoknowis___________hewillcometospeaktoustomrow.17)Thequestionis___________theycantakeouradvice.18)Letmeknow_____________youcan’tmeetmeatJacksonThroopStreetsWednesdayafternoonattwoo’clock.19)Wewerediscussing__________we

9、shoulddiscussthebusinesswiththem.20)Thequestion__________wellbuildanotherlecturehasntbeensettled.21)Thequestion____________hellcomeisunknown.22)Tellme__________itisnotgoingtorainplease.23)Idon’tcare________hedoesn’tshowu