Move a

Move a

Just as there is general rule for all phrase structure rules, that is,the X-barschema, there is a general movement rule accounting for the syntactic behavior of any constituent movement. This movement rule is called Move α (or Move Alpha).
(P85)：如同X-标杆规则将各种短语结构规则高度概括起来一样,句法位移也有一条普遍规则来解释所有的句法成分位移现象,这种移动规则叫作移动α规则。α是一个希腊字符,用在这里代表任何成分。移动α规则是说移动任何成分到任何位置。