一.作连词引导原因状语从句
(1)I have to eat much food ,for I am too hungry .
(2)For what is seen is temporary,but what is unseen is eternal.
因为看得见的是短暂的,唯有看不见的才是永恒的。
For是的.引导词,其中"sth"由what引导的主语从句来充当
二.作介词后面接名词从句(主语,宾语 从句)
I'll tell you the news for what it is .
虽然不知道是真是假,但我想告诉你这个消息.
介宾结构作状语
其中介词:for
宾语:由what引导的名词从句来充当
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