动词时态的问题
他上个月做的这个工作.He did this work last month.
如果加一个He said.就是"昨天他说他上个月做的这个工作"
该变为什么样的句子?
Yesterday he said he did this work last month.
Yesterday he said he have done this work last month.
Yesterday he said he had done this work last month.