例句：

　　It's twenty years since I've seen her.

　　我已經(jīng)二十年沒(méi)見(jiàn)她了。

　　We've been here twenty years, near enough.

　　我們在這里待了差不多二十年了。

　　We have lived in the same house for twenty years.

　　我們在同一座房子里住了二十年了。