Do you know that what time the train leaves 改错,删去that,为什么呢?

这是一句宾语从句,宾语从句后跟陈述句,连词就用that比如：Do you know that she is going abroad?但这句话后面的宾语从句是疑问句,有疑问词what time,所以只要直接用what引导就好了Do you know what time the train leaves?记住：从句的连词只要一个就好了。