部分倒裝的形式: 主謂賓保持原來的形式，謂語動詞的助動詞放到主語的前面。
1、當句首狀語為否定詞或帶有否定意義的詞語時，這個句子就需要部分倒裝
這類詞語有hardly, scarcely, rarely, seldom, never, few, little, less, at no time, by no means, in no case, under no circumstance, in no way, on no account, on no consideration, no longer, not only等。
eg. He never smokes. 他從來不抽煙。
Never does he smoke. eg. Not only did the customer complain about the food, he also refused to pay for it. 這位顧客不僅僅 抱怨食物不好，還拒絕付費。
eg. 在任何情況下我都不會相信你。Under no circumstance do I trust you.
2、當句首為only加狀語的時候，這個句子需要部分倒裝
eg. Only with you can I feel happy. eg. 只有當你來了這，我們才可以開始會議。
Only when you come, can we start the meeting.
3、so...that 結(jié)構(gòu)中的so位于句首時，常引起部分倒裝
eg. He runs so fast that I can't catch up with him. 他跑得實在是太快了，以致于我都沒有辦法追上他。
So fast does he run that I can't catch up with him.
eg. The moon was so bright that the flowers bright as by day. 皓月當空，花朵就像白天那樣的鮮艷。
So bright was the moon that the flowers bright as by day.
4、句子開頭的as 處在第二個單詞的位置上，表示雖然的意思
eg. Although I am young, I can live by myself. 雖然我很小但是我卻能養(yǎng)活自己了。
Young as I am, I can live by myself.
eg. Although she is a girl, she can support the hole family. 雖然她是個女孩，但是她卻可以養(yǎng)活整個家庭的人。
Girl as she is, she can support the hole family.
eg. Although I like music very much,.... Much as I like music,.....
5、常見的固定搭配結(jié)構(gòu)中需要用倒裝的情況
hardly.....when.... 一......就...... scarcely .....when.....
hardly，scarcely 后面一定要用過去完成時，when 后面用一般過去時。
eg. Hardly had he seen me when he ran away. 他一看到我就跑開了。
eg. Hardly had the baby cried when his mother rushed to carry him. 嬰兒一哭，他媽媽就跑去抱他。
no sooner....than..... 一......就......
no sooner 后面一定要用過去完成時，than 的后面用一般過去時。
eg. No sooner had they reached home than it rained more and more heavily. 他們一到家，雨就越下越大起來。
the more ......the more... 越....越....
eg. The harder you work, the happier you feel. 你工作越努力，就越覺得快樂。
