Question

it is……that引导的名词性从句中that后面的从句可否用动名词做主语啊？做好举例说明一下，不要复制粘贴

Answer 1

it is ......that引导的名词性从句应该就是“以it作形式主语、that引导主语从句”的句型。
像这个结构其实只要that后面引导的是一个完整的句子就可以了，对于它引导的句子到底是结构并没有规定。所以这里是可以用动名词做主语的，没有影响。
比如：It is true that telling lies does no good. 说谎真的没有好处。
it指代that telling lies does no good.
句子本来是That telling lies does no good is true.
只不过为了保持英语句子结构的协调，我们用it作一下形式主语，避免句子头重脚轻而已。所以前面的句子到底用什么做主语，没有关系。
像这里telling lies这个动名词短语作that从句的主语，而从句的谓语是does。
这个问题不用纠结的~。~

Answer 2

可以。例如：It should be stressed that learning a foreign language is a life-long task.
动名词做主语和在什么从句从句中没有关系。原则上说，只要意思上说得通，任何从句都可以用动名词做主语。
例如：
1. You'll understand that making others happy makes you happy too. (动名词短语在宾语从句中做主语。)
2. Although eating is an important part of life, it's not the only part.(动名词短语在让步状语从句中做主语。)
就说这些吧。

Answer 3

it is……that引导的名词性从句中that后面的从句不可以用动名词做主语。
比如It is eating that makes me fat!
因为这个名词性从句作主语了，所以后面的谓语动词不可能是动名词了。

Answer 4

可以，且看例句：It is obvious that doing more exercise can make you heathier.

Answer 5

It is eating that makes me fat!这个答案可以吗？