在La La Land的劇本中,
有一段是男主角的員工拿支票給男主角簽名.
Employee: I got a check for you to sign.
Sebastian: How'd we do last month?
Employee: Not too bad.
Sebastian: Not too bad is great.
我想請問"How'd we do"的文法,
男主角在問上個月的收入的時候為什麼會用這種時態呢?
我查了英英字典並沒有查到合適的解釋,
請各位大大幫忙指點.
謝謝.

How'd we do = How did we do 簡單過去式 疑問句