动词短语
中文翻译：Unknown
同义词：
['Tap on the roof', 'knock on the roof']
例句：
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1.The old house needed some repairs before it could be used again.
这所老房子需要一些修理才能再次使用。
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2. The children were playing on the roof of the house when it started to rain.
孩子们在房子的屋顶上玩耍，当开始下雨时。
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3.She tapped on the door to see if anyone was home.
她敲门看是否有人在家。