英语高手帮帮忙,要考试了,

错了。应该是He said ，he will come，didn't he？在反义疑问句当中，时态要对起来，然后是前面肯定，后面否定，后者前面否定，后面肯定。（中考会出选择题，掌握技巧即可）
He said he wouldn't he ，wouldn't 这句话看不懂，麻烦你看一下有没有打错
sing with 和dance to 对的
The room is twice as big as that 错，应该是The room is as big as that ，意思是这个房间和那个房间一样大，如果楼主的意思是这个房间是那个房间的大两倍就是 The room is twice bigger than that
若不懂，欢迎继续提问！！

首先He said ,he will come,doesn' t he?是绝对错误的。。。前面是said过去式后面应该用过去将来时。
其次 sing with 和dance to是两个词组 用在句子中如： I love the songs that I can sing with
I love the songs that I can dance to
最后 The room is twice as big as that 并无语法错误，但这句话的意思是 这个房间是那个的两倍大 如果是大两倍就是 The room is twice bigger than that
本人自己回答，很辛苦 希望楼主采纳
希望我的回答对您有帮助
友情提示：楼主的问题是初中英语重点哦，也是中考重点。。。希望楼主尽快掌握

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