The reason why he didn't come is ____ he is tired.

问题描述:

The reason why he didn't come is ____ he is tired.
空格处是填that好还是because好?
还有同位语从句:
Nobody believed his reason for being absent _that____ he had to meet his mom at the airport.
如果句中的that要用because代替,那么还要怎么变?

1.填that,这是表语从句,because不能引导表语从句.
2.Nobody believed his words that he was absent because he had to meet his mom at the airport.第1句到底是宾语从句还是表语从句? 我觉得像宾语从句。第2句我知道用that,但是如果我用because的话,句子那里需要变动一下?1, 在be动词后面的就是表语从句2. reason一般不和because连用吧