house prices,which have been static for several months,are now rising again 请问这是什么句型?

问题描述:

house prices,which have been static for several months,are now rising again 请问这是什么句型?
为洒要用逗号隔开
为洒要用逗号隔开 为什么后面用are

主要部分就是House prices are now rising again.房价在上升.
which have been static for several months是定语从句
两个逗号可以隔开定语从句
这句话翻译过来就是静止了几个月的房价现在又开始上升了.
因为主语是prices,所以谓语用are