was interrupted by a knock at the door 我想问BY后面应该是个名词形式,为什么KNOCK不变KNOCKING?
was interrupted by a knock at the door 我想问BY后面应该是个名词形式,为什么KNOCK不变KNOCKING?
英语人气:182 ℃时间:2020-03-23 21:04:49
优质解答
knock 在这里就是名词 敲门声 knock 有名次敲门声 和动词敲门 的意思
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