用作定语
▲～+n.
 He is an unexpected guest to her.对于她来说,他可是位不速之客。
His unexpected death is unexpected news. 他的猝死是一个意外的消息。
用作表语
▲S+be+～
 His promotion was unexpected.他的升迁出人意料。

［同义词］   startling, sudden, surprising, unforeseen
［反义词］   expected, normal, predictable