连词在语法结构中扮演着至关重要的角色，它们主要分为两大类别：并列连词和从属连词。在前一节课程中，我们已经对并列连词进行了详细的探讨，而本节课将重点聚焦于从属连词的用法和功能。
从属连词属于虚词的一种，其主要作用是连接不同的从句成分，例如它们经常被用来引导名词性从句和状语从句，从而对主句进行修饰和补充说明。在解答涉及从属连词的语法题目时，通常需要根据给定的语境来判断应该使用哪个具体的连词。在初中阶段的英语学习中，从属连词的应用主要集中在以下几个方面：
如：as, before,after,when,while,until, till, since, as soon as等
I’ll call you as soon as I get home.我一到家就给你打电话.
如:if、unless、as long as等
As long as you’re happy, that’s all that matters
表原因的连词有：because / as、since等
eg: She is ill, so she doesn’t come to school.
【温馨提示】because和so不能同时用在一个句子中。
例如：
Because the weather is hot, so I stayed at home. (×)
because 是 引导从属句 的连词，其结构是“主句+because从句”或“because从句+主句”
可以更改为：Because the weather is hot, I stayed at home.
表目的的连词有： so that、so、in order that等
eg: She studied hard in order that / so that she can pass the exam. 她努力学习以便能通过考试。
表结果的连词有：so / such… that…、so 、so that等
eg: He was so angry that he couldn’t speak. 他如此生气以至于说不出话来
表让步的连词：though / although、even if / though、whatever / whoever / whenever / wherever / however等
eg: Even though it is hard work, I enjoy it. 尽管这是一项辛苦的工作，我却乐于其中。
【温馨提示】though和although不能与but连用，但可以和still，yet等连用。
例如：
Though / Although Tom is young, but he knows a lot. (×)
Though / Although Tom is young, he knows a lot. (√)
Tom is young, but he knows a lot. (√)
以上内容涵盖了从属连词学习中的几个核心要点，是理解和掌握这类连词用法的关键所在。