When did you think of such a good idea?(改为被动句)

同义句Can you think of a good idea for the matter?Can you--- -- she couldn’t think of a good idea同义句 Do you think of a good idea 等于什么 -Do you think it's a good idea to go for a picnic on such a What makes you _the good idea?A,think B,to think C,think of 改为被动语态2You must take good care of the children3when did you I think he has a good idea.改为否定句,has要不要变回have? I think it is a good idea.（改为否定句）…… i think it was a good idea to watch tv 改为否定句 did you have a good meal?(改为肯定句 Did you do a good job 改为肯定句 since when did you two become such good friends?