it is gone它走了（离开了,不复存在了）
ADJ离开的；过去的；不复存在的
While he was gone she had tea with the Colonel...
他不在时她跟上校一起喝了茶.
He's already been gone four hours!...
他已经离开4个小时了!
By morning the smoke will be all gone.
这些烟到了早上就会散尽.