那位一直在急诊室门外等候的母亲一见到医生便立刻站了起来。
The mother who had been waiting outside the emergency room jumped to her feet the moment she saw the doctor.
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who英 /huː/|美 /hu/
had英 /hæd/|美 /hæd/
been英 /biːn/|美 /bɪn/
waiting英 /ˈweɪtɪŋ/|美 /ˈweɪtɪŋ/
解释
who had been waiting 为过去完成进行时在定语从句中修饰 the mother，说明她在见到医生之前已持续等候的语境背景。
The mother who had been waiting outside the emergency room jumped to her feet the moment she saw the doctor.
who had been waiting 为过去完成进行时在定语从句中修饰 the mother，说明她在见到医生之前已持续等候的语境背景。