they do not doing their homework为什么不对呀?我看新概念上面说是 they are not din_其他解答

they do not doing their homework为什么不对呀?
我看新概念上面说是 they are not ding their homework.
不是说BE动词后面不能跟动词吗?DO不是动词吗?

人气：455 ℃　时间：2019-12-01 05:39:38

解答

这句话是现在进行时态,表示现在正在进行的动作.
doing在这里是do的现在分词,
而不是动名词,