whether及if的常见用法区别.docVIP

结合高考看whether和if的常见用法区别 Whether即可以引导宾语从句，也可以引导主语从句、表语从句、同位语从句、或者与动词不定式连用。If可以引导宾语从句（动词宾语且不提前），也可以引导主语从句（用IT做形式主语,从句位于句尾）。whether和if二者做“是否”讲，在从句中不担当成分，只起衔接作用，此时题干中往往会出现表示“不肯定”意义的词，如：not sure/certain,not decided/known,is unknown,is still a question,depend on等。 首先看下面几道高考真题： _______ the 2000 Olympic Games will be held in Beijing is not known yet.(MET 92) A. Whenever???? B. If??????? C. Whether????? D. That ②. _______ well go camping tomorrow depends on the weather.(NMET 96) A. If?????????? ??B. Whether? C. That???????? D. Where ③(01上海春) What the doctors really doubt is ______ my mother will recover from the serious disease soon. A. when???????? B. how????? C. whether????? D. why (03 上海卷)--- Dad , I’ve finished my assignment. --- Good, and _____ you play or watch TV, you mustn’t disturb me. A.whenever?????? B. whether? C.whatever????? D.no matter （05天津卷）Elephants have their own way to tell the shape of an object and _______it is rough or smooth.?? A. 不填??????? B. whether???????? C. how??????????? D. what? （06江苏）We haven’t settled the question of ______ it is necessary for him to study abroad. ? A. if　? 　　　 B. where 　　　　C. whether　　 　 D. that　 （08重庆卷）33. All people, __ they are old or young, rich or poor, have been trying their best to help those in need since the disaster. A.????? even if? B. whether????? C. no matter?? D. however 　分析：答案分别为： C ② B ③ C ④ B ⑤ B ⑥ C ⑦ B 分别考察了whether引导的主语从句（ ）、宾语从句（ 动词tell的宾语、介词of宾语）、表语从句（）以及whether 和or 连用引导让步状语从句（ ） 结合以上高考试题，我们可以看出whether和if的用法区别是中学英语教学中的一个重要的知识点，也是高考命题人时常青睐的考点。笔者现结合以上高考试题及多年教学积累将其常见用法简述如下。 1.whether和if均可用来引导主语从句，但if引导的从句不能位于句首。 如：Whether the sports meeting will be held depends on the weather. ②Whether they win or lose is all the same to me. ?他们是赢是输於我都一样. ?（此时whether不能换作if ） Its doubtful whether therell be any seats left. ?说不上还有没有空座位了. (此句whether能换作if) ? 2.whether和if均可用来引导宾语从句。 如：I dont 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。 We