Grammar — Revision of Tenses 2

"A few weeks ago, a woman called to report a robbery at her house."

لماذا استخدمنا called وليس was calling؟

"It happened at four in the afternoon when she was watching news on TV."

لماذا استخدمنا was watching وليس watched؟

"The burglar came in through the front door, picked up the woman's handbag, emptied it out and stole her purse."

لماذا كل هذه الأفعال بصيغة Past Simple؟

"Times were hard and the family had been struggling for some time."

لماذا استخدمنا had been struggling وليس struggled أو was struggling؟

"When she came into the room, the burglar had already left."

لماذا استخدمنا had left وليس left؟ وما وظيفة already هنا؟

"Policeman: What were you doing after you woke up?"

لماذا استخدم الشرطي were you doing وليس did you do؟

"Did anything happen while you were watching TV?"

لماذا استخدمنا while مع Past Continuous وليس when؟

"I was preparing lunch when he came."

لماذا was preparing وليس prepared؟ وما العلاقة بين الفعلين؟

"She had worked as a waitress for three years when he met her."

لماذا had worked وليس worked أو was working؟

"Scientists announced the launch of the new drug last week. They had developed it for five years."

لماذا had developed وليس developed أو have developed؟

"By the time I got to the meeting, they had already discussed the important issues."

ما وظيفة By the time؟ ولماذا تستوجب Past Perfect؟