it's going to rain,The radio says 变间接宾语He is laughing .Tom says变间接宾语

The radio says it's going to rain.
Tom says he is laughing .

1.The radio says that it's going to rain.
2.Tom says that he is laughing.

宾语从句间接引语时态变化：若主句是一般现在时，引语时态不作调整

The radio says it was going to rain.
Tom says he was laughing
这种类型的，主语的谓语时态不变，从句be动词改为过去式就可以

The radio says it is going to rain.
【时态与says呼应】
Tom says that that boy is laughing.
【He与Tom不是同一人,人称要改变】
宾语从句间接引语时态变化：若主句是一般现在时,引语时态不作调整