2 sentences

1. 我今天上午一直觉得很瞌睡。

   wǒ jīn​tiān shàng​wǔ yī​zhí jué​de hěn kē​shuì.

   I felt very sleepy all morning.

   Source: Dong Chinese Dictionary

2. 他在听讲座的时候打了个瞌睡。

   tā zài tīng jiǎng​zuò de shí​hou dǎ le gè kē​shuì.

   He dozed off while listening to the lecture.

   Source: Dong Chinese Dictionary