只有在你孤独的时候你才属于我英文

you belong to me when you feel lonesome

You belong to me only during the time you are lonely .

you come to me only when you feel lonely.
这样比较好。
如果按一个字一个字地翻译
you belong to me only when you feel lonely.
感觉很奇怪。

only when you alone can you belong to me

you cant be mine until you fell lonely..
这样可以不。。。
感情比较强些。