5、,whatever,whoever,whom等以及连接副词how,when,where,why等词引导。that在句中无词义,只起连接作用;连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用,在从句中充当从句的成分。because引导表语从句。注:whom、who指人,what指物,whatever,whoever表示泛指意义。例如:Whathewantstotellusisnotclear. Whowillwinthematchisstillunknown. Itisknowntoushowhebecameawriter. Where