请分析下面句子的成分.
Where were you and Susan on March 23rd?
where是表语
were是系动词
you and Susan是主语
on March 23rd是时间状语
We were at the office on March 23rd.
we是主语
were是系动词
at the office是主语补足语（表语）
on March 23rd是时间状语
请问我这样分析正确吗?