Use.- used when the event 2, as happened in the past. One, before another one.The situation arising before use Past Perfect.The company was later used Simple Past.I wasn 't hungry. I had just eaten.They were hungry. They had not eaten for five hours.I didn 't know who he was. I had never seen him before.The train had left when we arrived.- use the events before the one point in the past.Jane had never seen lion until yesterday.By 1985 I had, taught that class for ten years.
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