when and where 做主语,谓语动词用复数还是单数

when and where做主语，如果when和where连在一起用单数，如果分开用复数，例如：When and where they had the party was unknown。When they had the party and where they had it were unknown。When and where。意思是在哪里。

用法：where用作疑问副词。在(往、从)哪里，在什么地方。例句：Where are you？你在哪儿？Where did you get the computer(form)？你从哪儿弄到这台电脑的?Where did you study medicine？你从哪儿学的医？

where用作连接副词，引导下列从句：Where bees are，there is honey。〔状语从句〕哪儿有蜜蜂哪儿就有蜜。I’m going to do what I like and go where I like。〔状语从句〕我要做我想做的事，去我想去的地方。

where用作关系副词，引导定语从句：England is one of the few countries where(=in which)people drive on the left。英国是少数沿左侧开车的国家之一。We then moved to Paris，where we lived for six years。我们后来搬到巴黎，在那里住了六年。