作业帮the reason he refused my inviation is that he has been.为什么这个是that写because行不
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the reason he refused my inviation is that he has been.为什么这个是that写because行不
the reason he refused my inviation is that he has been.为什么这个是that写because行不
the reason he refused my inviation is that he has been.为什么这个是that写because行不
The reason he refused my inviation is that he has been……
= He refused my inviation,because he has been……
解析：because为连词,其作用为连接两个独立的句子
that是跟在reason后面的，说的是reason的内容，他不是一个独立的句子，如果用Because的话就是另外一个句子了
因为主语是表示原因的词
另外，你这个句子reason后面还应该有个why
不行，可以这么说
He refused my inviation because he has been...
这里明显是一个that引导的表语从句。
什么是表语从句？
一般情况下是指that出现在系动词（am/is/are,was/were)之后。还是比较好判断的。
那么that一般引导哪些从句呢？
让我们整理一下：
1. 主语从句：That the earth goes around the sun is known to us all.
2. 宾语从句:...
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这里明显是一个that引导的表语从句。
什么是表语从句？
一般情况下是指that出现在系动词（am/is/are,was/were)之后。还是比较好判断的。
那么that一般引导哪些从句呢？
让我们整理一下：
1. 主语从句：That the earth goes around the sun is known to us all.
2. 宾语从句: The teacher said that the earth goes around the sun.
3. 表语从句: One of the greatest discoveries was that the earth goes around the sun.
4. 同位语从句：The fact that the earth goes around the sun is known to us all.
判断的方法就是看这个从句中主句中作什么成分，如果是主语，则that是引导主语从句的，如果作宾语，则是引导宾语从句的。
从形式上看，出现在句首的That，一般就是引导主语从句的连词(例1），出现在句子的中间，及物动词后边的，是引导宾语从句的连词（例2）。出现在中间，系动词后边的，则是引导表语从句的连词（例3），出现在fact, news, 等后面的则为引导同位语从句的连词（例4）。
要注意的是，有时为了避免主语太长，放在前面给人感觉头重脚轻，可以用形式主语it来放在句首做个样子，而将真正的主语（从句）后置如：
It is known to us all that the earth goes around the sun.
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