______,they went to the playground.a.Their homework finished b.Their homework was finishedc.Their homework being finished d.Their homework had been finished独立主格结构,但是为何选A 其他项错在哪?

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______,theywenttotheplayground.a.Theirhomeworkfinishedb.Theirhomeworkwasfinishedc.Theirhomeworkbeing

______,they went to the playground.a.Their homework finished b.Their homework was finishedc.Their homework being finished d.Their homework had been finished独立主格结构,但是为何选A 其他项错在哪?
______,they went to the playground.
a.Their homework finished b.Their homework was finished
c.Their homework being finished d.Their homework had been finished
独立主格结构,但是为何选A 其他项错在哪?

______,they went to the playground.a.Their homework finished b.Their homework was finishedc.Their homework being finished d.Their homework had been finished独立主格结构,但是为何选A 其他项错在哪?
独立主格结构为名词+分词(现在分词或过去分词),意思是作业完成了,他们去了操场.c 表示正在进行,不选.b,d 都是完整的句子而后面又没有连词连接,所以不选

独立主格结构其中的一种形式是“名词+分词(现在分词或过去分词)”。纵观四个选项,只有a. Their homework finished 符合。

独立主格结构为 主语+分词,排除b.d。作业被完成且在去操场之前,排除c(c是代表被动进行)。

b,d都是完整的句子不能用逗号连接后边的话,独立主格就只能是A了