knocked
knocked (敲门)是瞬间动词,在英语中,瞬间动词用一般过去时.持续动词用过去进行时
jusy as we were leaving ,the postman (knocked/was knocking) at the door
jusy as we were leaving ,the postman (knocked/was knocking) at the door
英语人气:907 ℃时间:2019-11-11 21:57:06
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