The aspect particle 了 (2): an action is done

动态助词“了（2）”在动词后，表示动作行为已经发生或完成。否定时用“没”，不加“了”。 了 right after a verb shows that the action has happened or is finished: 我看了一个电影 (I watched a movie). 我买了一个新电脑. In the negative, use 没 and drop 了: 我昨天没去商店.

Examples

• 我看了一个电影。

  Wǒ kànle yí gè diànyǐng.

  I watched a movie.

• 我买了一个新电脑。

  Wǒ mǎile yí gè xīn diànnǎo.

  I bought a new computer.

• 我昨天没去商店买东西。

  Wǒ zuótiān méi qù shāngdiàn mǎi dōngxi.

  I didn't go shopping at the store yesterday.