还有优惠吗?
Is this product still on sale?
Does the discount still work?
Is the discount still effective (on this product)?
这件商品没有优惠啦
No,the sale on this product is over.
No,the discount on the product is over.
优惠可以用 on sale 或者 discount
这件商品还有一些优惠.
You can still enjoy discount on this one.
This one is still on sale.