B．强调句与定语从句、状语从句等其他句型的区别

有时强调句在形式上和定语从句、状语从句很相似。我们除了从意思上进行区分外，还能根据强调句结构特点来进行判断，如能去掉It was ...that ... 后，句子仍然通顺，就是强调句。

It was at the railway station that we first met 16 years ago.

是在火车站我们16年前第一次相逢。（强调句，强调地点状语at the railway station）

It was the railway station where we first met 16 years ago.

这是我们16年前第一次相逢的火车站。（定语从句，where 是关系副词，在定语从句中做地点状语）

It was in this street that the car accident happened the other day.

前几天发生汽车事故的就是在这条街上。（强调句，强调地点状语in this street）

It was this street where the car accident happened the other day.

这是前几天汽车事故的那条街。（定语从句，where 是关系副词在定语从句中做地点状语）

It was at midnight that he got home yesterday.

他昨天是半夜到家的。（强调句，强调时间状语at midnight）

It was midnight when he got home yesterday.

昨天他到家时已是半夜。（when引导的是时间状语从句，it 是代词，指时间）