一、否定词位于句首

一般说来，以下否定词位于句首，句子要用倒装(部分倒装—-用一般问句的形式)：seldom, never, little, few, hardly, not, not until, in vain, in no way, by no means, on no account, no longer 等。如：

1、Never does he come late. 他从不迟到。

2、Little did he know that the police were after him. 他一点也不知道警察在找他。

3、By no means shall I go there again. 我决不会再去那儿了。

4、Hardly had he arrived at the station when the train began to leave. 他一到车站，火车就开动了。

5、Few students did they see in the classroom. 他们在教室没看到几个学生。

6、Not a word did I ever say to him. 我从未对他说过一句话。

7、Not until all the fish in the river died did the villagers realize how serious the pollution was. 直到河里的鱼全死了，村民们才意识到污染是多么严重。

二、陈述句改反问句时，反问词“难道”是应该放在句首还是应该放在肯定词或否定词前呢？

陈述句改反问句需要注意以下三点：

1、将句中的肯定词改为否定词，或将否定词改为肯定词。

即有“不”去“不”；无“不”加“不”。

2、在句中一般添加矗锭避瓜篆盖遍睡拨精合适的反问语气词（怎、怎么、难道等）。

3、在句末一般添加恰当的疑问助词（呢、吗、啊等），句号改为问号。