动词短语
中文翻译：现在完成进行时态同义词
同义词：
['present perfect tense', 'present perfect continuous']
例句：
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1. She has been working on her project for two weeks now.
她已经在这个项目中工作了两周了。
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2. They have been studying English for three years.
他们已经学习英语三年了。
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3. We have been playing basketball since last Sunday.
我们从上星期天开始一直在打篮球。