强调句型结构及用法分别是什么？

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。

例子：It was yesterday that he met Li Ping.他是昨天遇见李平的。

2、一般疑问句的强调句型

同上，只是把is/ was提到it前面。

例子：Was it yesterday that he met Li Ping?他是昨天遇见李平的吗？

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？

例子：When and where was it that you were born?你是什么时候在哪里出生的？

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

例子：It was not until his wife came back that he went to bed.直到他妻子回来，他才上床睡觉。

5、谓语动词的强调

A. 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

例子：Do be careful when you cross the street.过马路时，务必（千万）要小心啊！