Can you imagine how much I paid for the lesson?
你能想象这次教训花了我多少钱吗？
Can you imagine there is no water in the earth?
你能想象地球上要是没水会怎么样吗？
Can you imagine she finished these heavy work in a day?
你能想象她在一天内竟然完成这么多繁重的工作吗？