已经(过去完成时)

The students were questioned on the books they had been studying.
学生被问到有关他们所学课本内容的问题。
来源:《牛津高阶英汉双解词典》The course had been geared towards the specific needs of its members.
课程已作调整,以满足学员的特别需要。
来源:《牛津高阶英汉双解词典》
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