18.1 倒装
倒装是把正常语序的一部分调换，用于强调、句式要求或保持平衡。
正常语序：
He rarely goes out at night.否定副词放句首时，常用部分倒装：
Rarely does he go out at night.
他很少晚上出去。常见引起倒装的否定或半否定词：
never, rarely, seldom, hardly, little, no sooner, not only, not until例句：
Never have I seen such a beautiful place.
我从未见过如此美丽的地方。
Not only did he finish the work, but he also helped others.
他不仅完成了工作，还帮助了别人。地点副词或介词短语置于句首时，也可完全倒装：
Here comes the bus.
公交车来了。
On the wall hangs a picture.
墙上挂着一幅画。18.2 强调句
常见强调句结构：
It is/was + 被强调部分 + that/who + 其他部分例句：
I met Tom in the park yesterday.强调不同部分：
It was I who met Tom in the park yesterday.
是我昨天在公园见了 Tom。
It was Tom that I met in the park yesterday.
我昨天在公园见的是 Tom。
It was in the park that I met Tom yesterday.
我昨天是在公园见的 Tom。
It was yesterday that I met Tom in the park.
我是昨天在公园见的 Tom。18.3 省略
英语为了避免重复，常省略已知信息。
I like coffee, and she likes tea.可省略为：
I like coffee, and she tea.但这种省略较书面或修辞化。日常更常见：
I can speak English, and he can too.
我会说英语，他也会。状语从句中，如果从句主语与主句主语一致，且从句中含有 be，可以省略“主语 + be”：
When he was young, he lived in London.
When young, he lived in London.