has been to\in在什么情况下才省掉介词

has been to\in在什么情况下才省掉介词
has been to\in在什么情况下才省掉介词

has been to\in在什么情况下才省掉介词
如果后面接的是副词就可以省略介词,如has been here 已经到这里了,here是一个副词,前面不用介词