在句子中起名词作用的从句叫名词性从句,它相当于名词或名词性词组,在从句中能充当主语、宾语、表语和同位语等。根据它在句中担当的不同成分,名词性从句又可分为主语从句、宾语从句、表语从句和同位语从句。名词性从句是中学阶段一个非常重要的语法项目,是历年高考 The clause that plays the role of a noun in a sentence is called a noun clause, which is equivalent to a noun or noun phrase. In a clause, it can serve as a subject, object, predicative, and appositive. According to the different components it plays in the sentence, nominal clauses can be further divided into subject clauses, object clauses, predicative clauses and appositive clauses. Noun clause is a very important grammar item in middle school and it is a college entrance examination