一个句子中有两个动词,两个都要过去式吗?如：The attached is engineering drawing for customer needed change,we have changed and pls confirm by customer.这句子对吗?

你可以说：The attached is the updated engineering drawing as customer required. Please confirm.(若你是让第三方发送给客户的，则将后面一句换成Please confirm with our customer)

首先，一个句子中有两个动词，并列关系的话都要用过去式，其他句型结构另论。
然后，句子不对，不能直接字面翻译，中式英文。修改如下:The attached is engineering drawing for customer which required to modify .We have already modified, pls confirm .

如果从严正的语法上说,这个句子肯定缺少某些部分.这个句子从整体来看还是看的懂的,the attached is engineering drawing for customer needing changing,we have changed it and pls confirmed by customer.
the attached应该呗当作名词成分 附件,engineering drawing 工程图 customer need change.客户和需要存在的是主动关系所以应该是现在分词needing,need 后面加动词ing 表示被动,这里即需要被改变,后面就不解释了.坐观楼下看法

要变。都得变。 这里要用was，因为主从句是同一个时态，所以前后两个通常来说，如果第一个动词变过去式，为了保持整个句子和动作的时态一致，那么