宾语从句:(that常可省略) 1.用that引导:I'm sure (that) she will come. 2.用whether/if引导:表"是否"(但if不可放在句当"是否") I don't know whether it will be fine tomorrow. 3.用疑问词引导(what,when,where,which,how,who,whose,why): He didn't understand why they were laughing. 注:宾语从句中如果表达的客观真理或是事实,必须得用一般现在时来表达.如: I was told that the earth moves aroung the sun.
