题目内容：

You _______at home last night.Where______you?

优质解答

You were at home last night.Where were you?
这是系动词be的过去式啊.
be的过去式有两种,was 和were.具体选哪一个要根据句子的主语确定.主语是我和第三人称单数就选用was,主语是第二人称和复数就选用were.