原句感知 自主探究 ①It was Mary who did the experiment in the lab yesterday evening.

②It was in the park that I met my old teacher yesterday.

③It is a pity that you didn't see the film yesterday evening.

④It was seven o'clock when we reached the mountain village.

⑤It was yesterday that I met my old teacher in the park.

⑥It was my old teacher that I met in the park yesterday.

⑦Maria, do tell us a little about the Venice Film Festival.

⑧It is a good idea that we will have a swim this Sunday. (1)以上各句中，句①②⑤⑥⑦表示强调。

(2)上述句子中表示强调有两种表现形式。一种是用do/does/did＋动词原形表示；另一种是用强调句型表示。

(3)句③中的that引导主语从句，it是形式主语。同样用法的还有句⑧。

(4)句④中的it是代词；when引导时间状语从句。 　　

　　[语法剖析]

　　强调的功能和作用

　　在表达中，强调是对句中的主语、宾语、状语或状语从句进行充分强调而采用的一种特殊的表达结构，强调是一种修辞方法，能起到突出信息的作用。

语法点一 强调句型