你能成功的加我吗！！用英语怎么说. 不是“你能加我吗”！

Hi bro, I couldn't manage to add you as a friend on QQ, I simply had no idea what's going on!! could you?
如果你说以上一整句，就只说could you？就可以了，因为could you在这句里是could you manage?的意思,即“你能成功的加我吗”

如果你只说一句话“你能成功的加我吗”那你应该这样说：
Could you manage to add me as a friend on QQ?

而“你能加我好友吗？”的征询的意思这样用：
Can you add me as a friend on QQ?

加了一个manage之后两句话的意思就完全不同了。

manage本身就有succeed in achieving, doing or achieving (sth) 成功的达到，成功的做（某事）或者成功的产生的意思
可以查阅牛津高阶字典，manage 第二个解释里的（b）用法

can you connect with me

加一个 successfully 就可以了~~

Can you possibly add me successfully?