This paper analyzed the semantic generalization and its causes about the verb ＂lai/qu＂.The semantic generalization of ＂lai＂ can be divided into two stage,i.e.from the stage of ＂occurred,come out＂ to the stage of ＂doing sth.（instead of some specific verbs）＂.And the semantic generalization of ＂qu＂ experienced four stages.The process is different,but the causes of generalization exist some consistency.Economic principles are the external power,metaphor and metonym...
