没有关系。关键的区别在于thatthat在定语从句中,做主语或宾语,做宾语时能省略。that在同位语从句做引导词,不做成分,不省略,无含义。Ilikethefoodthathecooks.定从,做宾语,指代foodThenewsthathewonthegameistrue.同从,不做成分,特征是that后面是完整句子。另外注意what,定语从句中不用what做关系代词。