什么是it is… that…句式？

1、It is the +序数词 time +从句的结构中，从句用现在完成时。It was the first time +从句的结构中，从句用过去完成时。没有别的时态。例如：It is the first time that Mr Smoth has visited China. 这是史密斯先生第一次到中国来游览。

2、句型中主句it 可以用this，that，序数词first也可根据句意改变其他序数词。例如：This is the third time that Mr Smoth has visited the Summer Palace. 这是史密斯先生第三次游览颐和园。

扩展资料：

it is …that…形式区分是主语从句还是强调句：

最简单的方法是将it is\was及that去掉，并且剩余的部分组织起来，句子仍然能够组成完整的表达，并且成立，那么即为强调句，如若不能，否则不是强调句。

例如：All the members held a meeting in the room yesterday.

1、（强调a meeting ）It was a meeting that all the students held in the room yesterday.

2、（强调in the room ）It was in the room that all the students held a meeting yesterday.

3、（强调yesterday）It was yesterday that all the students held a meeting in the room.

It 作形式主语代替主语从句，主要是为了平衡句子结构，它是形式的主语而不是主语从句。主语从句的连词保持不变。它指向的强调句强调句子的一部分，不管强调的是什么，它都可以用作连接词。

扩展阅读：it is adj that ... what colour is it ... it is a wonder that ... it is+形容词 that从句 ... that s all right ... that is it口语意思 ... it is that句型 ... it is that中间加什么 ... that s great ...