过去进行时变间接引语时的时态变化?

1.引语的过去进行时无须变化.
如：He said,"I was playing soccer at that time."
→ He said that he was playing soccer at that time.
2.原因很简单：直接引语的过去进行时,表明该句强调的是过去某个时刻正在进行的动作或延续的状态,它必然有一个明显的过去时间状语.
而如果直接引语有明显的过去时间状语时,变间接引语时,该句的时态无须任何变化.
补充：一般不会搞混,因为引语中的时间状语会有比较明显的区别进行提示.
何况就算是搞混了也无碍你对句子的理解.
如：He said,"I'm doing my homework now."
→He said that he was doing his homework then.
He said,"I was doing my homework at that time yesterday."
→He said that he was doing his homework at that time the day before.