The history teacher said to them,“The Chinese * Party was founded on July 1st ,1921.

问题描述:

The history teacher said to them,“The Chinese * Party was founded on July 1st ,1921.
这题变成间接引语是The history teacher told them that the Chinese * Party was founded on July 1st,1921
这题后面部分 为什么不是 had founded呢?因为课本上说如果直接引语是过去时,那变间接引语是就要把过去时变成过去完成时的

因为老师陈述的是客观事实,所以不能变成过去完成时了.