主语从句和强调句区别是什么

像这个句子，觉得看作主语从句和强调句好像都行。

It was in the evening that I first met him.

但这个句子，好像只能看作主语从句 it is very important that you need to study hard.

你的上一个问题，我给解答了。不知何故不见了。

我把上次解答重新放在这里，供参考：

问题：It was in the evening that I first met him. 为啥不能填 when？

我认为，此句是强调句，用 when 不妥。

1. 如果被强调的是时间副词，强调结构除了用 that 外，还可以用 when。如果被强调的时间是介词短语，则不能用 when ，只用 that。例如：　　

It was yesterday that (when) he bought an English book in town.

It was last week that (when) we worked in the countryside.　　

It is at ten o’clock that the meeting will take place.（不能用when）

2. 由此得出，《薄冰英语惯用法词典》这个例句，不能看作强调句，而是一个主从句。

It was after two o'clock in the morning （主句）when the surgeon arrived at the hospital.（从句。it 指时间）

【翻译】外科医生到达医院时，（时间）已是凌晨两点之后了。

现在的这两个问题：

It was in the evening that I first met him. （前面已解答：这是强调结构。不是主语从句）

It is very important that you need to study hard.（主语从句）

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

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其它 1 个回答

wbw0918 1秒前

It was in the evening that I first met him.这是个强调句。去掉It was...that之后，原句的意思不变。In the evening I first met him.

It is very important that you need to study hard. 去掉It is...that 之后，不是句子。