条件状语从句遵循,主将从一,若主语是过去将来时,那从句是何种语态,若主语是过去完成时那?

Question

条件状语从句遵循,主将从一,若主语是过去将来时,那从句是何种语态,若主语是过去完成时那?

Answer 1

两种可能：
1 He said that he would come if his work WAS over before 5:00 pm.(一般过去时)
2 He said that he would come if he HAD FINISHED his work before 5:00 pm.(过去完成时)
3 He said that he would have done all his work by 5:00 pm if nobody WAS to interrupt him.(一般过去时)
4 若主语是过去完成时那?-------这种结构在英语中不存在,