He is in. (副词 in 作表语.)
He is out. (副词 out 作表语.)
He is away. (副词 away 作表语.)
He is upstairs. (upstairs 是副词.)
He is downstairs. (downstairs 是副词.)
He is in. (副词 in 作表语.)
He is out. (副词 out 作表语.)
He is away. (副词 away 作表语.)
He is upstairs. (upstairs 是副词.)
He is downstairs. (downstairs 是副词.)