“We expected that you would succeed”的语法问题这句中为什么用“would”?是虚拟语气吗?如果不是,请说明是什麽语法,

原句意为：我们期望着你能够取得成功.在该句中,would 不是虚拟语气,其语法解释为：动词expect后面有一个that引导的宾语从句,因为expect是过去式,所以宾语从句（you will succeed）要用相应的过去时态,所以will要变成would,即过去将来时,再如：1.He said,“I will go to Beijing tomorrow.→He said that he would go to Beijing the next day.”