it is time for having supper为什么不对?

it is time for having supper为什么不对? It is time for having supper. It is time for us to having supper now(找出其中一处错并改正） Is it time ( )supper?A.to have B.having It is time for supper now.Let'( )it. It is time for supper.（同义句） Alice,it is time for supper.（改为同义句） it,for,time,is,supper?怎么连词成句 连词成句 time it supper have to for is them .oven time meat in a it's time for supper.同义句 What is up?（同义句转换） It is time for supper（同义句转换） It is time （ ）（have）supper.