a set of keys 后用单数还是复数谓语

a set of keys 后用单数还是复数谓语 A set of keys是单数还是复数? a set of keys 作主语时谓语用单数还是复数? A set of keys谓语动词用单数吗? a set of keys作主语是谓语动词使用单数还是复数 a set of keys 作主语时,谓语动词用单数对吗 a set of keys 后面的动词用什么形式啊?是单数还是复数啊?还有a pair of 什么的. Frank,look at that ____是填 a set of keys还是填set of keys 是there is a set of keys还是there are a set of keys?is or are 英语短语开头要不要大写,要不要标点 如 是 a set of keys 还是 A set of keys. I lost a set of keys.然后是用 Is this yours?还是Are these yours? The set of keys 后用is 或are? 是a set of keys还是a set of key?哪个正确? this is换he/she is,a set of keys换keys可以吗?为什么a set of keys是复数,下面一句却是is this your set of keys.is不是单数用的吗?什么情况下用at?什么情况下要换第三人称形式?什么单词前面要加the?什么情况 a set of keys做主语动词用什么形式 A set of keys 后面动词用什么形式?详解 a set of keys 后面be动词用啥 A set of keys ( )(be) on the floor 一个英语句法问题 a set of keys 应该用is还是are提问 那a pair of shoes呢