强调句、It的用法

4、强调句例句：针对I met Li Ming at the railway station yesterday.句子进行强调。
强调主语：It was I that (who) met Li Ming at the railway station yesterday.
强调宾语：It was Li Ming that I met at the railway station yesterday.
around us. （it代替后面的air） They say he has left town, but I don’t believe
it. （it代替前面They…town分句中的情况） 2、代替有生命但不能或不必分阴阳性的东西（包括
婴儿）。
e.g. Yesterday we saw a big tree. It was fully twenty metres high. （it代替前面的tree） The baby cried because it was hungry. （it代替前面 的baby）
2、注意：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的用法
（一）作人称代词 1、it代替前面（或后面）的单数名词或分句等所表示
的事物。 e.g. You cannot eat your cake but have it.（it代替前
面的cake） Although we cannot see it, there is air all
wk.baidu.com
（三）谓语动词的强调
1、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。
e.g. Do sit down. 务必请坐。
He did write to you last week. 上周他确实 给你写了信。
Do be careful when you cross the street. 过马路时，务必（千万）要小心啊！
It was midnight when I got here yesterday.
It was two years ago that I joined the army.
（二）not … until … 句型的强调句
1、句型为：It is/ was not until + 被强 调部分 + that + 其它部分
5、it与that的区别：两词都可代替某一特定名词， 但that指同一类，并非同一个。
4、it与one的区别：这两个词都可以代表前面说过 的名词，但it用于同名同物的场合；one则用于同 名异物的场合。
e.g. ---- Do you still have the bicycle?
---- No, I have sold it.
---- Is this knife yours? ---- No. It is Xiao Zhang’s. Mine is the one on the desk.
强调地点状语：It was at the railway station that I met Li Ming yesterday.
强调时间状语：It was yesterday that I met Li Ming at the railway station.
5、注意：构成强调句的it本身没有词义；强调句中的连 接词一般只用that, 强调人的时候可用who，即使在强 调时间状语和地点状语时也如此，that, who不可省略； 强调句中的时态只用两种，一般现在时和一般过去时。 原句谓语动词是一般过去时、过去完成时和过去进行时， 用It was … ，其余的时态用It is … 。
3、在某些习惯说法中，可以代替人。
e.g. ---- Someone is knocking at the door, Peter. ---- Who is it? ---- It’s me.
---- Who are singing? children.
---- It is the
---- The light is still on in the lab. It must be the third-year students doing the experiment.
e.g. 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.
2、注意：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。
6、强调句型与定语从句及其他句式的区别。 即去掉强调句式结构或经过语序相应调态后，
原句仍成立。
It was because he was ill that he didn’t go to school.
= He didn’t go to school because he was ill.
It was at midnight that I got back home yesterday.
强调句、It的用法
强调句
（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 he met Li Ping. 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 he met Li Ping? 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?