Asking for information or help is a very common and necessary activity这个句子中的句子成分怎样划分

Asking for information or help 主语 （动名词做主语）
is 谓语
a very common and necessary activity 表语谢谢，我再来几句哟. It's important to use correct language, but sometimes this alone is not enough—we need to learn how to be polite when we make requests.多谢多谢It 形式主语 is 谓语 important 表语 to use correct language 真正主语 but 转折连词 sometimes 时间状语 this alone 主语 is not 谓语 enough 表语 we 主语 need to learn 谓语 how to be polite 宾语 when we make requests 状语从句