suggestion n. 建议
语法：suggest，insist，order，demand，require，desire等所引导的宾语从句，以及他们各自的名词所引导的名词性从句中要用到（should）do的虚拟语气，
如：
He suggests that a new school building（should）be built.
He insisted everyone be on time.
She orders he have a thorough exam.
She demands we go home.
They require they be treated equally.
