Used as a tag question, often to solicit agreement.

是不是，不是吗？用作附加疑问句，常用以征求对方同意。

The tag question is a very common linguistic phenomenon in oral English.

附加疑问句是英语口语中很常见的一种语言现象。

The tag question is one of the important English sentence patterns of speech.

附加疑问句是重要的英语口语句型。

Each tag question must agree in tense and subject with its preceding statement.

反意疑问句的问句部分一定要与前面陈述句的时态和人称一致。

Tag question that expresses uncertainty: Voice drops first and then rises at the end.

表达不确定的反意疑问句：声调先下降，在句尾上扬。