1. Who is making so much noise outside? It is the children. 为什么用it is2.LiMing speaks English well though he didn't go abroad. 为什么though 不可以用even if 来替换? 3. The teacher asked what was the matter when he saw a girl crying suddenly. 句序问题,什么时候是陈述句序,什么时候是疑问句序?不好意思哈，最后一题呢，不是想仅仅问这个题目的句序问题。是想问比如do you think 等插入语在疑问句中后面跟陈述句序，而这里却是疑问句序的问题。

1：children是复数的不可数形式。。（谁正在外面制造这么多噪音? 是孩子.）
2：LiMing 把英语说得很好虽然他没有出国。和LiMing 把英语说得很好即使他没有出国。两个句子句意略有不同。。。
3.疑问句：“ what was the matter ？” The teacher asked when he saw a girl crying suddenly.
陈述句：The teacher asked what was the matter when he saw a girl crying suddenly。这个应该就可以把 最后一个我不太确定 希望能帮到你的忙

1。我觉得it is 在这里是一个强调句的省略
完整的应该是
it is the children who is making so much noise outside。
2.LiMing speaks English well even if he didn't go abroad.
3.疑问句：“ what was the matter ？” The teacher asked when he saw a girl crying suddenly.
陈述句：The teacher asked what was the matter when he saw a girl crying suddenly。这个应该就可以把 最后一个我不太确定 希望能帮到你的忙

1.Who is making so much noise outside?It is the children.为什么用it is答：因为这里回答的意思是“making noise”这件事,所以用It is 的单数形式.参考“豆篼饱饱”在1-13,21:14的回答可以更容易理解.2.LiMing sp...