倒装句的用法，倒装是一种语法手段，用于表示一定的句子结构或强调某一句子成分。倒装的原因一方面是语法结构的需要;另一方面是强调而引起的倒装。
倒装句有两种：全部倒装和部分倒装
1.全部倒装，即把整个谓语放到主语之前(是整个谓语动词，而非助动词)。
Here comes the car!
车来了!
Round the corner walked a large policeman.
拐角处走着一个大个子警察。
2.部分倒装即只把谓语的一部分(如助动词、情态动词等)放到主语前。
Not until yesterday did little John change his mind.
直到昨天小约翰才改变主意。
Never have I seen such a performance.
我从来没有看过这样的表演。
雅思写作实用倒装结构
1.在由so/neither/nor引导的句子中，若表示与刚提到过的情况相同，句子需倒装语序。
《剑桥雅思真题4》Test 4 Listening Section 3
MIKE: Now, I quite like the idea of this one.
SUE: Yes, so do I.
迈克：我很喜欢这个主意。
苏：是的，我也是。
《剑桥雅思真题1》Test 1 Passage 3
The use of an architectural style cannot be said to start or finish on a specific date.Neither is it possible to say exactly what characterises a particular movement.
一种建筑风格的利用不能被说为开始于某个明确的日期或是中止于某个明确的日期。也不可能确切地去说它表现了一个独特运动的什么特点。
《剑桥雅思真题3》Test B Section 1
Application is absolutely free! Nor are there any annual fees or administration fees.
应用程序是绝对免费的!也没有任何年费或管理费。
2.当否定词、带否定意义的词或介词短语位于句首作状语时，句子用部分倒装。
比如：never(决不，从不), by no means(决不), hardly(几乎不), seldom(很少), scarcely(几乎不), in no case(决不), no sooner(立即), not only(不只)。
《剑桥雅思真题4》Test 2 Passage 1
Never before has the planet's linguistic diversity shrunk at such a pace.
这个星球的语言多样性从来没有以这样的速度萎缩过。
《剑桥雅思真题8》Test 3 Passage 1
Seldom is the weather more dramatic than when thunderstorms strike.
很少有天气比雷暴来袭时更剧变了。
《剑桥雅思真题10》Test 4 Passage 3
Not only are evolutionary throwbacks possible, they sometimes play an important role in the forward march of evolution.
进化的倒退不仅是可能的，它们有时在进化的前进过程中扮演着重要的角色。
By no means do I want to paint the industry with the same brush.
我绝不想用同样的方法来描绘这个行业。Hardly did I believe what you said.我几乎不相信你说的话。
In no case shall we allow smoking in the classroom.
教室里绝对不允许吸烟。
No sooner had we left the house than it began to rain.
我们刚离开家就开始下雨了。
3.“only+状语从句”“only+副词”“only+介词短语”置于句首引起的倒装句。
副词only置于句首，强调方式状语、条件状语、地点状语、时间状语等状语时，主句要进行部分倒装，即只将情态动词、助动词和系动词放在主语前。
注意：
如果被only所强调的状语为状语从句，则该状语从句不倒装，只对主句进行倒装。例如：
Only in a metropolitan was it possible to buy a new mobile phone.
只有在大城市里才能买到新手机。
Only when we had analyzed the data again did we realize that there was a mistake.
只有当我们再次分析了这些数据的时候，我们才意识到出了一个错。
Only because there were some canceled bookings did he get some tickets in the end.
只有一些预订被取消了，他才得以买到了几张票。
《剑桥雅思真题7》Test 1 Passage 1
Only after the mysterious mass extinction of the dinosaurs about 65million years ago were our ancestors able to emerge into the daylight in any substantial numbers.
只有在6500万年前恐龙神秘的大规模灭绝之后，我们的祖先才得以大量出现在阳光下。
解析：
only置于句首，be动词were置于名词词组our ancestors前，主句进行倒装，不倒装的语序为“Our ancestors were able to emerge into the daylight in any substantial numbers only after the mysterious mass extinction of the dinosaurs about 65 million years ago.”
《剑桥雅思真题8》Test 1 Passage 3
Only when many studies are combined in a meta-analysis will the faint signal of telepathy really become apparent.
只有当许多研究结合在一个综合分析之中，心灵感应的微弱信号才会真正明显起来。
解析：
only置于句首，助词will置于名词词组the faint signal前，主句进行倒装，不倒装的语序为“The faint signal of telepathy will really become apparent only when many studies are combined in a meta-analysis.”
《剑桥雅思真题8》Test 4 Passage 1
Only rarely are supplementary worksheets distributed in a maths class.
数学课上，老师只在极少数情况下才会发一些额外练习册。
解析：
only置于句首，be动词are置于supplementary worksheets前，主句进行倒装，不倒装的语序为“Supplementary worksheets are only rarely distributed in a maths class.”
初学者写作万能句：
Only by this way can we resolve/deal with/address this issue.
只有通过这种方法，我们才能解决这个问题。
解析：
此句一般可以置于结尾段，说明解决方法后使用该句。
练习：
只有这样做，我们才能建立多文化的世界。
Only by doing that, so can we build a multicultural world.
4.as引导的比较状语从句有时也用倒装语序。
《剑桥雅思真题7》Test 2 Passage 2
In Britain, for example, many of our best-loved farmland birds have vanished from huge stretches of countryside, as have even more wild flowers and insects.
例如，在英国，我们最喜爱的许多农田鸟类已经从大片的乡村消失，还有更多的野花和昆虫。
5.有时为了强调表语，常将其置于句首，同时将系动词提到主语之前。
《剑桥雅思真题7》Test 2 Passage 1
More surprising is the fact that the individual storeys of a Japanese pagoda, unlike their counterparts elsewhere, are not actually connected to each other.
更令人惊讶的是，与其他地方的宝塔不同，日本宝塔的每一层实际上并不相连。
