疑问句(第34-39单元)否定陈述句(negative statement)否定疑问句(negative question)附加疑问句(question tag),如isn't it?.
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研究共分为两个实验，分别考察了汉语否定陈述句与否定祈使句。
There were two experiments to investigate the Chinese negative declarative sentences and negative imperative sentences individually.
由否定陈述句加肯定简短问句构成的反意疑问句可用以提出请求，要求帮助或寻求信息。
You can use a negative statement and a positive question tag to ask people for things, or to ask for his information.
陈述句是对事实、安排或观点进行“声明”或陈述。陈述句可以是肯定句，也可以是否定句。陈述句以句号(。)结尾。
A declarative sentence "declares" or states a fact, arrangement or opinion. Declarative sentences can be either positive or negative. A declarative sentences ends with a period (.).
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