阐述：is there no one else?

is there no one else?
就没别人了?
is there anybody else?
还有其他人吗?
is there anybody?
有人吗?
is there somebody?
有这个人吗?
最后一句话可以这么理解,例如有人跟你说,有个人会帮忙的.
你问会有这样一个人吗?就可以用is there somebody?不过好像用someone 的多一些.