语法小知识：表语从句的特殊引导词

除了常见的五类引导词外，表语从句还有三类特殊引导词，这三类词引导词使得表语从句有着不同于其他几种类型从句的特点，但因为知识点太细而容易被忽略，沪江小编梳理的整理了这三类引导词的用法和例句，希望能给大家的学习提供帮助。

一. （just）as

表示“正如”，经常与动词 look/seem/appear搭配使用。

eg. It seems just as something terrible happened.

     It looks as she is crying.

二. as if/as though

表示“好像”，也常动词look/seem/appear搭配使用，as if/though后面的表语从句中的谓语动词一般采用虚拟语气形式，通常是该谓语动词的时态采用相应的过去时态。

eg. It looks as if/as though she was angry.

     Now it was as though she had known Millie for years.

     It isn’t as if you were going away for ever.

三. because

because也可以引导表语从句，表原因，但since/as/for等同样表原因的词不可以用来引导表语从句。

eg.It is because I love you too much.

    It's because I helped him to finish that project.

好了以上就是小编为大家整理的表语从句的三类特殊引导词，不知道大家都记住没有呢？表语从句是用来描述主句状态的名词性从句，是非常常用的复合句，各位学习者们既可以利用表语从句来轻松的表达多层意思，也可以增强语言的丰富度，在各类考试写作中都会成为一个加分点。同时和其他从句一样，表语从句的构成也是有着很明显的规律和特点，同学们只要掌握好最核心的东西，就能够举一反三，灵活地将表语从句运用到自己的写作或日常交流中了。