摘要:现在完成进行时的谓语动词构成 I/ we/ you/ they have been working he/ she/ it has been working 现在完成进行时的用法 (一)表示从过去某时开始一直持续到现在的动作.并且还将持续下去. The Chinese have been making paper for two thousand years. 中国有2000年的造纸历史. I have been learning English since three years ago. 自从三年前以来我一直在学英语.

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