动词短语
中文翻译：承诺好好地
同义词：
['swear', 'pledge', 'vow']
例句：
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1.I promise to finish the project on time.
我保证按时完成这个项目。
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2. She promised to help me with my homework.
她答应帮我做作业。
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3.They made a promise to each other that they would never forget each other's birthdays.
他们互相承诺永远不会忘记对方的生日。