英语句子成分分析,四个句子

英语句子成分分析,四个句子
如题①While i can understand you,i disagree with you.
②Could you help me look up the word in the dictionary when it is convient for you.
③It is.said that drinking eight glasses of water everyday is good for our skin.
④In 1985 the USA made the rose its national flower it stands for beauty and love.
英语学霸你在哪?（别怪我悬赏值太低,这是我的全部家当）

1、尽管我理解你,但是我不支持你.主语为“i”,谓语“disagree”,宾语“you”,逗号前面的是从句；
2、当你方便的时候,你能帮我用字典查一下这个词吗?这事个疑问句,你后面是不是打错标点了?Could...dictionary是句子的主干,“when”后面是时间状语从句；
3、据说每天喝八杯水对皮肤有好处.“It”做形式主语,真正的主语是“drinking...water”,is是be动词做谓语,“skin”宾语；
4、我个人觉得这句有点Chinglish的感觉,你姑且参考一下吧!改成：In 1985 the USA made the rose that stands for beauty and love as it national flower.我觉得句子更通顺,要不然就在“flower”后面加逗号,再加个“which”