Unit 10 By the time I got outside,the bus had already left.
重点、难点、考点及疑点注释
1. When I got to school, I realized I had left my backpack at home. (P76)我到学校时才发现把书包落在家了。
(1)had left my backpack at home 这是一个过去完成时的句子，表示在过去某一时间或某一动作之前完成的动作或存在的状态。
By three o’clock yesterday afternoon we had finished the work.
到昨天下午三点，我们已经完成了工作。
She had learned a lot of English before she went to school.
在上学之前，她已经学会了很多英语。
(2)left是leave的过去式，在此处意为“遗忘”，“忘记”，后面常有地点状语。
Li Min left his dictionary in the reading-room yesterday.
昨天李民把词典忘在阅览室里了。
特别提示
forget作“遗忘”解时，后面没有“遗忘”的地点。
I have forgotten the book. 我忘记拿书了。
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