由肯定陈述句加肯定疑问短句构成的反意疑问句可用以表达对某人所述事情的回应，例如表达兴趣，怀疑或者愤怒。
When you want to show your reaction to what someone has just said, for example by expressing interest, surprise, doubt, or anger, you use a positive statement with a positive question tag.
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 (.).
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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