It is...that...的句型 求详解

题目

It is...that...的句型 求详解
It must be obvious what the problem itself is.
it 是形式主语,obvious 是表语.这个不是强调句吧?what前面是不是省略了that?what引导的是个什么从句?
It is not what we do once in a while that shapes our lives,but what we do consistently.
由but连接的两个复合句.是不是强调句型?前面一句是不是 原型为去掉 it is...that,变成 Not what we do once in a while shapes our lives 或者是,不是强调句型,因为主语太长所以用it 做形式主语?
求针对这两个句子的语法详细语法解析 不要复制粘贴

答案

第一句,不是强调句,也没有省略that.what引导的是主语同位语从句,该句可写成：What the problem itself is must be obvious.第二句,是强调句,It is … that shapes our lives. 其中所强调的是个以关联词not…but…所...