Do you have this in blue?
你们这件有蓝色的吗?That comes in green,blue and red.
那件有绿色,蓝色和红色。How much is it?
这件多少钱?
How much does this cost?
这件多少钱?It's on sale at the moment.
现在正在打折。Do you have a size 8?
你们有八号的吗?Do you have it in smaller sizes?
你们有小一点的吗?We're having a sale at the moment.
我们正在特卖中。