反问句是用疑问句形式表达肯定或否定语气的句子。在英语中，常见的反问句标志词语包括"Isn't it"（期望对方同意），"Don't you"（表达期望或猜测），"Can't you"（表达失望或不满）和"Couldn't you"（表达请求或建议）。
isn't it
这是一种常用的反问句形式，通常用来表达期望对方同意自己的看法。例如：
- You like this movie, isn't it?
- This is a beautiful day, isn't it?
don't you
这种反问句形式通常用来表达自己的期望或者猜测。例如：
- You'll come to the party, won't you?
- You know the answer, don't you?
can't you
这种反问句形式通常用来表达自己的失望或者不满。例如：
- You can't do it by yourself, can you?
- You can't be serious, can you?
couldn't you
这种反问句形式通常用来表达自己的请求或者建议。例如：
- You could help me with this, couldn't you?
- You couldn't give me a ride, could you?
