一、作“是……还是……”解时,whether 表示一种选择,其后可以跟介词短语或不定式短语。She made the mistake whether by accident or by design. Whether through choice or obedience I don”t know, but he certainly did all the work very well. 是出于内心自愿还是奉命行事,这我不晓得,不过他的确是把所有的工作都做好了。 I don’t know whether to accept the offer or refuse it. = It is doubtful whether to accept the offer or refuse it. It is to be decided whether to go or stay here.---->it作形式主语。Will you advise me whether to accept his suggestion (or not)? 二、作“是否,会不会”解时,whether 可用来引导名词性从句,即主语从句、宾语从句、表语从句和同位语从句。1、引导主语从句。引导主语从句时,可用 it 作形式主语。例如: Whether they consider this opinion or not is not clear. = It is not clear whether they consider this opinion or not. Whether we shall be able to come is doubtful. = It is doubtful whether we shall be able to come. 2、引导宾语从句。这时 whether 可与 if 换用。例如:A simple experiment will show whether air has weight or not. = A simple experiment will show if air has weight. I wonder whether we shall be in time for the last bus or (whether we shall)have to walk home. 我不知道我们是否可以赶上最后一班公共汽车,或是只好步行回家。 The question is whether we have to make a decision at once or not. All she's worried about is whether he is all right.The question is whether technology is going to be our servant or our master. 4、引导同位语从句。它的前面通常有fact, conclusion, news, problem, question, idea, doubt 等名词作同位语结构的中心词。例如: She has answered the question whether or not this supermarket is the largest one in the region. 她回答了这样一个问题,即该超市在这个地区是不是最大的。The question whether we ought to call in a specialist was answered by the family doctor. 关于我们是否该请一位专家过来的问题,家庭医生已经作了回答。 三、作“不论……还是……”解时,whether 引导让步状语从句。例如:Whether you can see the moon or not, it is always round. You may rely upon my help, whether others help you or not. 四、whether or no 除了能够像 whether or not 一样引导名词性从句外,还能单独放在句首或句末,作“无论如何”解。这时,它仅起状语作用。例如:We should complete the general design of the motorcar this year, whether or no.You should support your parents, whether or no.
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