are gone是什么时态

　　If the lips are gone, the teeth will feel cold.

　　唇亡齿寒。

　　Nine out of ten families are gone.

　　十停儿人家去了九停儿。

　　The days when they needed to pull publicity stunts to get noticed are long gone.

　　他们靠作秀出名的日子早已过去。

　　It may be hundreds of years before they are really gone in the earth.

　　几百年后它们可能会从地球上消失。

　　Hundreds of people are said to have gone into hiding to avoid arrest

　　据说有几百人为躲避逮捕而藏了起来。