語法第一冊第十課

語法１｜了 as a Sentence Final Particle

例句１｜她已經走了。

語法２｜了 Can Function Both as a Verb Suffix and a Sentence Final particle.

例句２｜我已經買了書了。

語法３｜Negation of Completed Action with 沒（有）

例句３｜我昨天沒看電視。