2 sentences for 落下 (là​xià)

1. 由于生病，他落下了一些课。

   yóu​yú shēng​bìng, tā là​xià le yī​xiē kè.

   He missed some classes because of illness.

   Source: Dong Chinese Dictionary

2. 他想通过加班来补偿落下的进度。

   tā xiǎng tōng​guò jiā​bān lái bǔ​cháng là​xià de jìn​dù.

   He wants to make up for the falling behind schedule by working overtime.

   Source: Dong Chinese Dictionary