move in/move into/move in三者的区别

move in/move into/move in三者的区别
今天学到新概念第一册第91课,文中有三个关于move的句子:
1.Has he moved to his new house yet?
2.When will the new people move into this house?
3.I think that they'll move in the day after tomorrow.
此三句中的move in/move into/move in应该怎么解释?意思是一样吗?可以彼此互换吗?