非谓语动词 At the beginning of the class,the noise of非谓语动词At the begin_英语解答

非谓语动词 At the beginning of the class,the noise of
非谓语动词
At the beginning of the class,the noise of desks ___could be heard outside the classroom.
being opened and closed
我选的是 opened and closed
为什么时态是进行时呢?题中貌似没有明确的时间标志呀.

人气：144 ℃　时间：2020-04-25 09:16:35

解答

这是老教材课文the last lesson中的句子.主语是the noise 后有个介词of,而介词后要接动名词,所以它后面应该出现doing的形式.而desks是被开和关的.所以用了动名词的被动式,即:being done.所以说答案就成了being ope...嗷嗷明白啦！老师您解释得很清楚，谢谢您！呵呵，祝学习有上进。