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复合句名词性从句 一个句子起名词的作用，在句中做主语、宾语/介词宾语、表语、同位语，那么这个句子就是名词性从句。 1.what/whatever的用法 考生应把握：what是关系代词，它起着引导从句并在从句中担当一个成分这两个作用。如： They lost their way in the forest， and what made matters worse was that night began to fall. Water will continue to be what it is todaynext in importance to oxygen. 2.whoever和whomever的区别 whoever和whomever相当于anyone who，用主格与宾格取决于其在从句中做主语还是做宾语。如： They always give the vacant seats to whoever comes first. 3.有关同位语从句的问题 引导词通常为that， 但有时因名词内容的需要，也可由whether及连接副词why， when， where， how引导。that不表示任何意义，其他词表示时间、地点、原因等。如：The problem， where I will have my college education， at home or abroad， remains untouched. 同位语从句有时与先行词隔开，注意识别。如： Evidence came up that specific speech sounds are recognized by babies as young as 6 months old. 4.whether与if在引导名词性从句时的区别 | 
