whether和if均可用来引导宾语从句.doc
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1、whether 和 if 均可用来引导宾语从句,表示“是否”,如:don't know whether/if I will be able to come.我不知道我是否能来 . She asked me whether/if I was interested in working for her.她问我是否有兴趣为她工作。但也有差别:1、 whether 可以与 or 或 or not 连用,而 if 不可以,如:He wondered whether he should waitor go .I dont know whether he will come. or not。2介词之
2、后用 whether ,不用 if .It depends on whether you will agree .3不定式前面用 whether不用 if .I wonder whether to stay here .5当从句或主句放于句首时,用 whether,不用 if .Whether this is true or not , I can't say .Whether I'll have time to go with you I am not sure6引导表语从句用 whether , 不用 if .The problem is whether we should
3、 go home or not8 作 discuss 的宾语,用 whether , 不用 if . They are discussing whether they should open the door9、当表示“如果”时用 if, 而不用 whether 强化练习:1. The question has not been answered _ Taiwan will be included on the Olympic torch relay route.A thatBwhetherCwhichDif2. You have not yet answered my question _
4、I can join in the party tonight or not.A.whetherB.ifC. thatD. which3 I d like to invite you to a party this evening. Thank you, but _ I ll be free I m not sure at the moment.A. whileB. ifC. whenD. whether4-What are you anxious about?-_A.If we succeedB.That we can succeedC. DowesucceedD.Whether we ca
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