forget it 有不可能的意思么

没有！forget it的意思是：算了吧;忘了吧;忘了它。

例句：1.I'll never forget it to my dying day.

我将终生不忘。

2.The accident is behind you now, so try to forget it.

这次意外已经过去了，把它忘掉吧。

3.Forget it. Don't waste your time. She's out of your league.

算了吧，她不是你追得起的。