【正文】
引導詞有連詞 that (that ??墒÷?), whether, if;代詞有who, whose, what, which;副詞 when, where, how, why 等。 Unit 2 Language Grammar and Usage Noun clauses introduced by question words amp。 賓語從句 在復合句中作主句的賓語。 同位語從句 在句中起同位語的作用。 29 More exercises about subject clause, object clause and appositive clause Step Three: it as preparatory subject Introduce when it is used as a preparatory sub