(3) 强调句的特殊疑问句型

疑问词+is/was+it+that /who/whom...?

Whom was it that I met at the railway station yesterday?

When was it that he changed his mind to take part in the activity？

(4) 在强调not ... until结构时必须把not与until一起放到被强调的位置上

例 It was not until she took off her dark glasses that I realized she was my brother.

(5) 注意强调句型与定语从句的区别

例 It was at 7 o'clock that he came here yesterday.( 强调句型)

It was 7 o'clock when he came here yesterday.(定语从句)

6. Beethoven became very popular in the Austrian capital and stayed there for the rest of his life.

贝多芬在奥地利首都很受欢迎，并在那里度过了余生。

7. As he grew older , he began to go deaf. 随着年龄的增长，他的耳朵变聋了。

8.Joseph Haydn was an Austrian composer and is know as "the father of symphony".

约瑟夫、海顿（1732-1809），是奥地利作曲家，以"交响乐之父"著称。

四 语法

语法一、时间状语从句

时间状语从句主要用于说明主句动词的时间,其类型颇多详见如下归纳。

1． When 引导的时间状语从句,意为"当......的时候"，when 的从句可以用延续性动词。

He was working at the table when I went in . 当我进去的时候，她正在桌旁工作。

I was watching TV when he came. 他来的时候我正在看电视。

注意：when 也可以作并列连词，表示一个动作即将或正在进行或刚完成的时候，突然发生了另一件事。

I was about to leave when the telephone rang. 我正要离开，这是电话铃响了。

We were working in the chemistry lab, when the lights went out.

我们正在化学实验室工作，突然灯熄灭了。

I had just gone to sleep when there was a knock at the door.. 我刚入睡就有人敲门

2． While 引导的时间状语从句，表示"与......同时，在......期间"。While 的从句中常用延续性动词或表示状态的词。

They rushed in while we were discussing problems. 当我们正在讨论问题时，他们冲了进来。

Father was cleaning the car while I was playing computer games.

当我正在玩电子游戏时，爸爸在清洗汽车。

注意：while 还可以表示对比意义，意为"而；却"。例如：

Jane was dressed in blue, while Mary was dressed in red.

珍妮穿着蓝色的衣服，而玛丽穿红色的。

3． As 引导的时间状语从句，作"当......的时候，一边......一边""随着----"解，as 的从句中可使用延续性动词，也可使用非延续性动词。例如：

He sang as he was working.他一边工作一边唱歌。

As time goes by, we have a better understanding of things around us.

随着时间的推移，我们对自己周围的事务有了更好的理解。

4． Before 和 after 引导的从句：前者一边表示主句的动作发生早从句的动作之前；后者