should be read是什么时态

是过去将来时
是被动语态下的过去将来时
般过去将来时表示从过去的某一时间来看将来要发生的动作或呈现的状态。在英语时态中，“时“指动作发生的时间，”态“指动作的样子和状态。 一般过去将来时的出发点是过去，即从过去某一时刻看以后要发生的动作或状态。

扩展阅读：should be allowed ... she should cleans ... should be treated ... should be built ... should be taken ... should have been ... suggest should be ... build your dreams ... even took up yoga ...