过去完成进行时(The Past Perfect Continuous Tense):表示过去某时前一直在进行的动作,由“had been+现在分词”构成: I asked him what he had been doing. 我问他一盲在干什么。 He had been working all day and was very tired. 他干了一天的活很累。 She show... 阅读全部 »

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