同位语从句指的是在复合句中充当同位语的从句，可以对其前面的抽象名词做解释说明，属于名词性从句的范畴。同位语从句的引导词为"that"，无含义，不充当成分，不可省略。
　　1. that引导同位语从句。
　　在下列名词后可用that引导同位语从句answer belief doubt fact hope idea information knowledge law news opinion plan suggestion thought truth等。
　　I had no idea that you were here.
　　The story goes that William killed his wife.
　　He always works hard in spite of the fact that he is not in good health.
　　Suddenly the thought came to me that he would go blind.
　　注意：
　　①位语从句引导词that无含义，不充当成分，不可省略。
　　②同位语从句与其说明的名词或代词为同 ...