题目内容：

Drinking enough water every day is good for our health.good 还有Watching a foodball game is fun to him.Watching foodball game 还有 They have Been good friend for many years.good friend 句子成分谢谢

优质解答

Drinking enough water every day is good for our health,动名词短语Drinking enough water做主语,is系动词,后面s good for our health是表语,第二句类似也是主系表结构.第三句they作主语,been系动词,后面表语,此句...