改错：He asked his mother whether he could throw them away.

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改错：He asked his mother whether he could throw them away.
改错：He asked his mother whether he could throw them away.

改错：He asked his mother whether he could throw them away.
throw 改为threw
或者asked改为asks
whether引导的宾语从句要求前后时态必须一致,

没错

throws

the sentence is correct, you can also use 'if' instead of 'whether' .
so don't think so much

给个罕见的答案，我觉得whether应该改成if.

Right

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He asked his mother whether he could throw them away.这句话的情况非常明显，首先分析句式。“ask..if”句式表达的意思是询问是否可以被允许做某事，那么if后面的部分一定是询问者决定要做的事情，这时候一般用could，表示询问是否被允许。而“ask..whether”多用于请示的含义，即发问者不知道要怎样做，因此请被询问者作出决议，这时候后面一般用should，表示没有感情色彩倾向的询问。因此，本句中，可以把could改为should，也可以把whether改为if，都成立。至于前面一位朋友的观点，此处的事态已经一致，无需更改。

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throw 改为threw
或者asked改为asks
whether引导的宾语从句要求前后时态必须一致，
回答者：这小孩真笨 - 经理四级 8-14 22:16

……没错啊……不要想太多了……

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