我在英语词典在看到这么一句话:Would you close the window? It's cold in here.第一个问题、不是说介词后面要接名词吗?怎么in后面可以加here这个副词?原句改成:It's cold here 也可以吧?第二个问题、(1) I have been here for two years(2) I have been in here for two years这两句话都正确吗?感谢大家的帮助!谢谢!