请问一下,It is very difficult for parents to decide whether to have a second child or not,为什么whether后用to have是不是表示选择的并列句,还是非谓语。请帮帮,谢谢!
whether不是并列连词,而是从属连词,whether...or...常引导名词性从句或让步状语从句。
引导名词性从句时,若后面直接紧跟or not时只能用whether;若后面不是直接紧跟or not,则也可以用if(但用whether更常见);当从句简化为不定式时却又只能用whether。例如:
I will write to you whether or not I can come. 我会写信告诉你我能不能来。
I don’t know whether [if] he will win or not. 我不知他是否能赢。
He doesn’t know whether to stay or not. 他不知道是否该留下。
▲很明显,你提供的句子就是whether引导的名词性从句简化为“whether+不定式”作to decide的宾语,并不是表示选择的并列句。即:
...to decide whether they should have a second child or not
→...to decide whether to have a second child or not
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It is very difficult for parents to decide whether to have a second child or not,
=It is very difficult for parents to decide whether they will have a second child or not,
参考译文:决定是否要第二个孩子对父母们来说非常困难。
备注:whether to have a second child or not属于从属连词whether+不定式to have构成不定式短语作前面“不定式to decide”的宾语,在意思上相当于下面的从属连词whether引导的“非谓语动词to decide”后接whether宾语从句
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