填空题 主语从句有两种类型:__________引导和__________引导. 在"主动宾补"结构中,如果宾语是从句,常用__________作形式宾语. 表语从句又称作__________. "It never occurred to him that she would be so displeased." 中,"that she would be so displeased"是__________从句