it is that的用法是什么？
it is that 强调句用法如下：当需要强调句中的主语，宾语和状语时，常用强调句：it is/was+ 被强调的部分 ＋that/who.He bought three books in the bookstore yesterday.强调主语：It was he that/who bought three books in the bookstore yesterday.强调宾语：It was three books that he bought in the bookstore yesterday.强调状语：It was in the bookstore that he bought three books yesterday.扩展资料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）+ 其他部分。例如：It was yesterday that he met Li Ping. 昨天他遇到了李平。2、 一般疑问句的强调句型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）+ 其他部分。同上，只是把is/ was提到it前面。例如：Was it yesterday that he met Li Ping? 昨天他遇到了李萍吗？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 + 其他部分？例如：When and where was it that you were born? 你何时何地出生？4、not … until … 句型的强调句句型为：It is/ was not until + 被强调部分 + that + 其他部分；此句型只用until，不用till。但如果不是强调句型，till, until可通用；因为句型中It is/ was not 已经是否定句了，that后面的.从句要用肯定句，切勿再用否定句了。普通句：He didn't go to bed until/ till his wife came back. 强调句：It was not until his wife came back that he went to bed.5、谓语动词的强调It is/ was ... that ... 结构不能强调谓语，如果需要强调谓语时，用助动词do/ does或did.例如：Do sit down. 务必请坐。Do be careful when you cross the street. 过马路时，务必（千万）要小心啊！此种强调只用do/ does和did，没有别的形式；过去时用did，后面的谓语动词用原形。
it is+形容词+that从句对吗？
对的。it is +形容词＋that从句有：It is natural that…很自然……It is strange that…奇怪的是……主语从句，it作形式主语指代后面的that从句，但为了避免头重脚轻就把that从句置后了，实际上that从句是主语，所以是主语从句。that后面接完整的句子，that在从句中不做任何成分，没有实际意义。主语从句：主语从句，即在复合句中充当主语成分的句子。例如＂That he finished writing the composition in such a short time surprised us all"，他在很短的时间内写完作文让我们都很惊讶，此复合句主要描述的是某事让我们惊讶，某事就是该复合句的主语，因此“That he finished writing the composition in such a short time”便是该复合句的主语从句。