I don't think he will study hard改为反意疑问句

反意疑问句的陈述部分为宾语从句时,一般要根据主句完成反义疑问句.但宾语从句的谓语动词是think,believe,suppose等词时,完成反义疑问句要看主句的主语是第几人称,如果主句主语是第一人称,完成反义疑问句时,人称时态看从句,肯定否定看主句,如I don’t think he is right,is he?　　如果主句主语不是第一人称,而是二三人称,完成反义时要根据主句完成,如：You don't think she is ringt,do you?