If you sell the cow ,you sell her milk too.这个句子的结构上是由if 引导的什

这是由if引导的条件状语从句,从句是If you sell the cow ,主句是you sell her milk too.主句在事实上是祈使句,可以省略you.又如：
You take good care of my books if I lend them to you.
翻译：
1 （你的句子）：如果你卖奶牛,连她的奶一起卖.--------做事要干净彻底.
2 （You） take good care of my books if I lend them to you.
我把书借给你,你要好好爱护.