B. The first verb in a pivotal construction does not take verb-suffix le. The second verb takes a sentence-end leif the action is completed. If the object of the second verb is quantified or modified, the second verb takes the verb-suffix le.

 

          Zuótiān qǐng(x) chī-le dùn Zhōngguó fàn. 

          昨天他请我吃了一顿中国饭。

Yesterday he invited me to eat a meal of Chinese food.