and 连接两个并列结构,i believe 做插入语 , One talk with him 属于名词性质短语 相当于句子功能! 如果要用Having a talk with him,应该去掉and 变成 Having a talk with him,you will find he is good!Having a talk with him 是非谓语动词做状语!
你把插入语I believe删除就看得出来啊。 这个是固定结构条件状语从句的一种 祈使句,and/or + 句子 Work hard, and you will pass the exam. Work hard, or you will fail the exam. 如果用Having a talk with him就只是个动名词,and连接是两个句子。 May it help!