Yesterday evening I was playing the piano when the doorbell rang这里when是从属连词还是并列连词,原因
问题描述：
Yesterday evening I was playing the piano when the doorbell rang这里when是从属连词还是并列连词,原因
答
是并列连词,相当于just at that time（正在这时.）,而不是“当.的时候.”的意思.
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