此句IF和WHETHER可替换吗I asked her if she wanted tea or coffee or ice-cream.if的位置可以用whether吗

此句IF和WHETHER可替换吗I asked her if she wanted tea or coffee or ice-cream.if的位置可以用whether吗 I don't know whether I should take his advice or not. whether 能用if替换吗?why? 英语语法：I'm not sure if he will come.是什么从句?另：此句中，到底能用if来替代whether吗？ 宾语从句,whether和if的用法如：他问我这本书是否值得读.翻为：He asked me whether?if?the book was worth reading .此句中用whether还是if?我觉得两者都可,规则1、有 or not 时只能用whether2、在介词后只能用w whether...or not中whether能用if替换吗?谢谢,请说明原因 I asked her__if__ she was enjoying her dinner.为什么不能用whether这里的if为什么不能替换成whether? 英语语法问题：I wonder whether to go out is right.一句中的whether能否被if代替?状语从句中的whether肯定是不能被if代替的。我关心的倒是whether后面的介词to对替换所造成的影响。 as though 可以用于省略句吗as if 可以用于省略句,从句主语和主句主语一致,可省略“主语+系动词”,那么as though呢? I wonder whether he knew the manager一句中whether是否可换成if if 和whether or not 能同时用吗?I don't think it matters if other people know whether or not buy a particular brand.帮忙分析下这句句子吧,它又有if,又有whether or not.原句buy a particular brand 前还有个“I” when 和if,as soon as表“一……就”时的区别when it stops raining,i'll show you the gardenif it rains,we'll have to go indoorsi'll call you as soon as i get home from work在句中意思一样吗 可互换? I will go to your home if i have a plenty of money.我将去你家,如果我有足够的时间.此句if后可以此时态吗?可简单解释一下条件从句的基本结构. regard...as...,take...as...,treat...as...可替换吗给点例句 Everything depends on whether it is fine tomorrow.此处的whether 可以换成 if whether 和if 的区别是什么 whether/if的用法此句中whether/if两者都可以用吗?Recently,our class have had a heated discussion about_______(是否) the Beijing Zoo should be moved out of the city. 据说在宾语从句中,whether or not和whether可以互换,语意不变.如：It is uncertain whether he will come (or not).那这两个句子中的whether可以换成whether or not吗?如：I want to know whether girls are valued as much as boys. if能引导主语从句吗?it is uncertain if he will leave for Beijing tomorrow.这里面的if 必须由whether替换吗? whether和if的区别