it is that都有哪些句式,除了强调句之外,还有没有形式主语,比如这句话It is certain that he will fail,这是一个什么句,
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it is that都有哪些句式,除了强调句之外,还有没有形式主语,比如这句话It is certain that he will fail,这是一个什么句,
it is that都有哪些句式,除了强调句之外,还有没有形式主语,比如这句话
It is certain that he will fail,这是一个什么句,
it is that都有哪些句式,除了强调句之外,还有没有形式主语,比如这句话It is certain that he will fail,这是一个什么句,
这是一个主语从句.而It's .that是强调句
（1）主语从句.
It is important that students today master English.
It is reported that China will send up a series of spaceships in the 21st century.
It is a rule that everyone should obey the State’s laws.
It happened that they were out visiting their friends.
可以看出,此类主语从句的句子成分无论是主语、谓语、宾语,还是各种状语都是完整的,并且不能称到“It is…”结构中去.这就是判别主语从句的基本点.
（2）强调句.
先举一个重点成分句：昨天我在书店看见了他.I saw him at the bookstore yesterday.
现将此句变成分别突出主语、宾语、地点及时间状语的强调句：
A、It was I that/who saw him at the bookstore yesterday.
B、It was him that I saw at the bookstore yesterday.
C、It was at bookstore that I saw him yesterday.
D、It was yesterday that I saw him at the bookstore.
比较无重点叙述对象原句和由此转换来的强调句可以看出,强调句是把原句拆散,把要强调的部分如主语、宾语、状语移到“It is…”之后.如果把“It is…that”去掉,并把移走的部分放回到原位,句子还是完整的,这就是判别强调句的基本方法.再把主语从句和强调句加以对比；主语从句各成分不能移到“It is…”结构中,而强调句则可以把句子的主语、宾语、状语等成分移到“It is”结构后面,其余放在“that”后面.
如果“It is…”之后是地点状语、时间状语、介词短语或从句,“It is…that”必为强调句型.除上面所述的C、D例句外,再补充例证如下：
It was here/there that we took a picture of him last year.
It was last year he went abroad.
It was after I came here that I learned a lot.(我到此之后才学到很多东西.)
It was not until he came back that we had dinner.(直到他回来后我们才吃饭.)
另外,在强调句“It is…”中,it is后不会出现形容词、过去分词及谓语词形式,这些词用在带有主语从句的“It is…that-clause”结构中.
（3）“It is…that”结构中的that可能引出定语从句.
It is this dictionary that I am looking for everywhere.（这是我求之不得的词典啊.）
在这样的句型中,it不再是形式主语或无意义,而是说话人心目中的指代的“那个”.that是关系代词,介词for的后面乍看无宾语,实际是前移走了.又如：
It was the most fascinating place that we’ve visited.