1．当陈述部分的主语是I，而句子又用来征询对方的意见时，附加疑问句中的主语用you。如：
I find English very interesting, don’t you?
I don’t like that film, do you?
2．当陈述部分的主语是everybody, everyone, someone, nobody, no one, somebody等合成代词时，附加疑问句中的主语通常用they。但亦可用he，尤其是nobody, no one等作主语，具有否定概念时。如：
Somebody phoned while I was out, didn’t they?
Everyone enjoyed the party, didn’t they?
Nobody wants to go there, does he?
