How long have you stayed here since you came.

自从你来这儿以来，你呆了多久了?。

youdao

How long have you stayed here since you came to China?

自从你到中国以来，你在这儿待了多久了？

youdao

Could you tell me how long you have stayed here?

能告诉我你在这里待了多久吗？

youdao

Could you tell me how long you have stayed here?

能告诉我你在这里待了多久吗？

youdao