Her husband is the kind of man who is always happy and has never to have any trouble分析语法重点翻译who is always happy and has never to have any trouble的语法结构是不是 to have any trouble 做 has never 的宾语has to是不是不可以 理解为 不得不 的意思

总是快乐没有烦恼的人

定语啊·· 修饰the man 说明她的老公是个怎养的人
她老公整天乐呵呵的，从来没有烦恼

who is always happy；
who has never to have any trouble
中间and连接两个从句，共用一个先行词who

这是个定语从句，前面的主句是 Her husband is the kind of man（她的丈夫是这样的一类男人），哪一类呢？，who后面就开始解释了： is always happy and has never to have any trouble，意思就是 her husband is always happy and has never to have any trouble。

她丈夫是那种总是开心,从没有任何烦恼的人.
who is always happy and has never to have any trouble
有什么好分析的啊?has never to do

这是一个定语从句，who is always happy and has never to have any trouble是修饰man的
who is always happy and has never to have any trouble这又是一个并列句，可以等同于who is always happy and who has never to have any trouble。