He has often been there.换成He often to there.怎么样

不可以，He has often been there意思是“他经常去那里”，但换成to就语法不通了
建议改成He is often there
不改变原义，而且更加简练

错误。

here和there都是地点副词，前面不需要加to,若句型转换，改成He often be there.即可。

he has often been there, 他一直去哪里

he often to there, to因该改成go [go to 是去， to是那里]

不行啊，没有动词阿~而且there是副词前面不能加介词to.说He often goes there.还行。