动词不定式的完成进行时表示在过去某个时间点之前已经开始，但还在继续进行的动作。例如，“我的朋友已经开始学习如何弹吉他一年了”或“我们的团队已经开始策划这个项目超过三个月了”。这种语法形式可以用来描述持续的动作，并在英语语言中广泛使用。
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我的朋友已经开始学习如何弹吉他一年了。 My friend has been learning how to play the guitar for a year.
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我们的团队已经开始策划这个项目超过三个月了。 Our team has been planning this project for over three months.
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她已经在学习法语了，但她还需要继续努力。 She has been studying French, but she still needs to keep working hard.
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我已经开始准备考试了，但我还需要更多的练习时间。 I have been preparing for the exam, but I still need more practice time.
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他已经开始尝试写小说了，但他还需要学习更多的技巧。 He has been trying to write a novel, but he still needs to learn more skills.
