I don't know Arabic so I can't get that specific. Here are some problems worth considering, however.
1. Students sometimes forget which verbs are non-progressive and put them in the past progressive. *Susan was knowing that the train left at 9 o'clock (should be Susan knew). However, this problem is not specific to the past tenses. *George is having a brother. (sh
students may face difficulties while learning past simple tense and past progressive tense, so I'm asking you to tell me some problems that students may face in general?