Question

"it is that they have no interest in sports"

这个句子对不对。如果对，帮忙分析一下句子成分。

Answer 1

it is that they have no interest in sports.
句子看上去没什么，但其实 " It is that " 却显得多余，为什么呢？因为这种句型本来就是要强调后面的从句，强调它什么呢？可你在 " It is that " 这并未说明，例如说" It is obviously(明显) that " +从句就好了。
这种句型通常是：
It is+ 被强调部分 + that + 修饰被强调部分的从句.
注： " It " 只是一个形式主语，真正的主语是后面句子的" they "。

Answer 2

应该对吧,是定语从句吗?
不过改成 it is why they have no interest in sports. 好点吧.

Answer 3

对，是个强调句，句子的真正主语是they have no interest in sports

Answer 4

正确。that后面引导的是一个宾语从句。