分析此句详细的语法结构

If we intend to have friends to dinner,we plan the menu,make a shoping list ,decide which food to cook first ,and such planning is an essential for any type of meal to be served.
1.and 连接表示并列关系的两个分句
2.If we intend to have friends to dinner,we plan the menu,make a shoping list ,decide which food to cook first
if 引导的条件状语从句, we plan...是第一个分句的主句
3.such planning is an essential for any type of meal to be served
动名词planning做主语, 是个主系表句型,后面的是个由for引导的表示对象的状语, to be served 是不定式的被动语态做meal的定语.

首先这是个状语从句,if到dinner为从句 后面的为主句部分 plan make decide都是主句中的谓语 decide后面的句子并不是从句 因为用的是非谓语动词 其实主句部分是一个用and连接的并列句