英语附加疑问句是具有疑问句表层结构的独立语法单位.

The English tag question is an independent grammar unit with the interrogative surface structure.

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 a very common linguistic phenomenon in oral English.

在特定语境下，附加疑问句作为礼貌策略的一种实现形式，减轻面子威胁行为并且照顾到听话人的积极或消极面子。

In specific contexts, tag questions act as the realization of politeness strategies to mitigate face-threatening acts and attend the hearers' positive face or negative face.

给下列问句加上附加疑问句。别忘了加问号。

Add the tags to these questions. Don't forget to add the question mark.