现代汉语接入语"是的"源于近代汉语具有确认事件义的"X是的"判断句中的"是的".接入语"是的"在近代汉语中的形成过程具有瞬时性,这一过程不宜解释为语用化过程,而应解释为征派过程.Mandarin thetical shide(是的) comes from the "shide" in the event-confir- ming copulative construction "X shide" in Pre-Modern Chinese. Its formation is a simulta- neous process, which should not be construed as pragmaticalization, but as cooptation.