last month our car had risen 他是过去完成时 但过去时间点 不是直接用过去式就行了吗

外教写的 last month our car had risen by 就是这句话 last month our car had risen by 怎么我看到有其他单单过去的句子 也能用但又的同学说 因为是 last month 所以直接用过去 last month our car rose那过去式的 last month our car had risen 他是过去完成时 但过去时间点 不是直接用过去式就行了吗 last month our output of car had risen by 这句话是错的 应该是last month our output of car rose by但是为什么这个行 两个都意味着i had gona much before i caught them为什么不能用过去完成时 last month our output of car our sales were down last month. 英文改错 did you bought a car last month. Jim bought the new car last month(同义句） A car a_ happened near our school last night. Mr Brow left our hometown last month改为同义句 Mr Brow --- ---- --- from our hometown ---- --- mont This is the car, _______we bought last month.看清楚 有逗号 my father bought a car last month ,but unluckily ,the price of petro i（ ） again? Last month we asked our students about their free time activities.翻译成中文 I want to do our utmost in the last month 准确的中文翻译! Compare with last year,our pay has increase--------- about ￥500 every month用by还是to Last month,everyone in our class played a part ____ trees.A.in planting B.planted Our school has a long history,it celebrated its _____(eighty)birthady last month. we were busy ___ready for our exam last month A getting B to get 英语翻译last month. last month 中文?