Subject + 在 + 午睡
午睡 (wǔshuì) means "to take an afternoon nap" or "midday rest." It specifically refers to sleeping during the middle of the day, a common cultural practice in China.
中午太困了,我想午睡一会儿。
Zhōngwǔ tài kùn le, wǒ xiǎng wǔshuì yīhuìr.
I'm so sleepy at noon — I want to take a short nap.
爷爷每天都要午睡半个小时。
Yéye měi tiān dōu yào wǔshuì bàn ge xiǎoshí.
Grandpa takes a half-hour nap every day.
午睡之后感觉精神多了。
Wǔshuì zhīhòu gǎnjué jīngshén duō le.
I feel much more refreshed after a nap.