ارجو شرح قاعدة الماضي المستمر واهم الاسئلة الي فية

The past continuous tense زمن الماضي المستمر
1- يتكون من :
مفرد was
V. + ing
جمع were
2-يعبر عن فعل كان مستمرا في وقت ما في الماضي :
Ali was eating lunch at 2 O'clock yesterday.
3- الكلمات الدالة :
- At …………….. o'clock yesterday
- While بينما / اثناء - When عندما
While ماضى بسيط و ماضي مستمر
While we were playing. Samy fell over.
When ماضي بسيط و ماضي بسيط
When I heard about the accident , I went to help the injured.
When ماضي مستمر و ماضي بسيط
When father came , I was doing homework.