She heard the front door open and heavy footsteps in the hall.

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• She heard the front door open and heavy footsteps in the hall.
• She heard the front door open and heavy footsteps in the hallShe heard the front door open这句话有语法问题吗为什么不是 the door was opened,而直接用原型?希望高手能帮我分析一下.
• She heard the front door open and heavy footsteps in the hall.如果是动词为什么不用过去时态?.请分析这个英语句子：She heard the front door open and heavy footsteps in the hall：这个句子中的open是动词还是形容词？如果是动词为什么不用过去时？
• 1.she heard front door open and heavy foot steps in the hall
• 1.she heard front door open and heavy foot steps in the hall可否改为she heard front door opening and heavy foot steps in the hall 2.he told me that he could not go to sleep one night because he heard a strange noise coming from the bar可否改为heard a strange noise come from the bar
• She heard the front door open and heavy footsteps in the hall
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