He was working in the factory when I saw him last time.

问题描述:

He was working in the factory when I saw him last time.
请问这句话前面用的was working是过去进行时,后面saw又是过去式,这句话到底属于什么时态?一句话可以同时存在几个时态吗?

He was working in the factory是主句 when I saw him last time.是时间状语从句,表明了过去的一个时间点,那么在过去的一个时间点正在发生的动作,主句就用过去进行时;而从句动作的发生在过去,故用一般过去时,主、从...