it is+n+that从句 是名词性从句吗that可省吗？ it is+adj. +that从句 是名词性从句吗 是哪一...

it is+n+that\u4ece\u53e5 \u662f\u540d\u8bcd\u6027\u4ece\u53e5\u5417that\u53ef\u7701\u5417

\u4e0d\u80fd\u7701\u7565
\u56e0\u4e3a\u8fd9\u662f\u4e3b\u8bed\u4ece\u53e5\uff0c\u4e0d\u662f\u5bbe\u8bed\u4ece\u53e5\uff0c\u5bbe\u8bed\u4ece\u53e5\u7684\u4ece\u53e5\u7684\u8fde\u8bcd\u5728\u4e0d\u7f3a\u5c11\u6210\u5206\u65f6\u5019\u53ef\u4ee5\u7701\u7565\uff0c\u4e3b\u8bed\u4ece\u53e5\uff0c\u8868\u8bed\u4ece\u53e5\uff0c\u540c\u4f4d\u8bed\u4ece\u53e5\u90fd\u4e0d\u80fd\u7701\u7565

\u4e3b\u8bed\u4ece\u53e5\uff0cit\u662f\u5f62\u5f0f\u4e3b\u8bed\uff0c\u540e\u9762\u7684\u53e5\u5b50\u662f\u771f\u4e3b\u8bed\u3002\u5982 It is quite clear that the whole project is doomed to failure.

这个句子可以有两种理解，第一种是名词性从句，其中that不可以省掉，这是个主语从句。在名词性从句中除过宾语从句，其它的几个里that 是不可以省掉的。另一种是强调句，强调that绝对是不可以省的。

这是强调句的句型，that 不可以省略。
（一）强调句句型
1、陈述句的强调句型：It is/ was + 被强调部分（通常是主语、宾语或状语）+ that/ who（当强调主语且主语指人）+ 其它部分。
e.g. It was yesterday that I met my classmate.
2、一般疑问句的强调句型：同上，只是把is/ was提到it前面。
e.g. Was it yesterday that I met my classmate?
3、特殊疑问句的强调句型：被强调部分（通常是疑问代词或疑问副词）+ is/ was + it + that/ who + 其它部分？
e.g. When and where was it that you were born?
4、强调句例句：对I met my classmate at the bus station yesterday.句子进行强调。
强调主语：It was I that (who) met my classmate at the bus station yesterday.

是it作形式主语的一种，that引导真正的主语从句，一般不能省

扩展阅读：it is+adj+that从句 ... it was not until that ... it+was+that强调句 ... it is believed that ... it is+形容词 that从句 ... it is that 强调句用法 ... are these your books ... it is+强调部分 that造句 ... it is that 万能强调句 ...