改成Here are your keys.或者改成Here is your key.为什么改为here are your kes?本句属于倒装句，主语是your keys，因此谓语动词为are。your key错在哪儿呢?为什么是your keys?谢谢！改成Here is your key. 完全可以。your key作主语，谓语动词就得用单数is。