Are you ready to run?这个句中“Are”为什么不用“Can”或“Do”?

Are you ready to run?这个句中“Are”为什么不用“Can”或“Do”? Are you ready for a quiz?为什么前面用are 而不用do 关于Are you ready to leave?为什么不能说Do you ready to leave? 为什么是are you ready 而不是do you ready? are you ready to are you ready to go为什么刘俊麟都没唱 Are you ready ,do you ready? are you ready to order? --Are you ready to leave? are you going to scarborough fair为什么要用are问而不用do? you to ready Are now order 连词成句 are you ready to start的同义句