So I ran three miles to school only to discover nobody was t
4个回答

that引导的宾语从句只是起连结作用,本身没有意义,在口语或非正式文件中可以省略.

但是有些情况不可省

主句中有it作形式宾语,that不可省

例:We think it is important that every citizen should have good manners.

宾语从句的第一个词为this/ that时,引导词that不可省

例:She told me that that night was very cold.她告诉我,那个晚上很冷.