2023年初中英语语法：过去完成进行时和过去完成时的比较
2023-01-09 19:02:56佚名
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过去完成进行时和过去完成时的比较
She had cleaned the office, so it was very tidy.
她已经打扫过办公室了，所以很整洁。(强调结果)
She had been cleaning the office, so we had to wait outside.
她一直在打扫办公室，所以我们不得不在外面等着。(强调动作一直在进行)
