吃完 + 后 + Clause
The compound verb 吃完 (chīwán) means "to finish eating." It combines the verb 吃 (to eat) with the resultative complement 完 (to finish/complete). It is commonly followed by 后 (after) to indicate what happens next.
吃完饭我们去散步吧。
Chīwán fàn wǒmen qù sànbù ba.
Let's go for a walk after we finish eating.
他很快就把一碗面吃完了。
Tā hěn kuài jiù bǎ yì wǎn miàn chīwán le.
He quickly finished a bowl of noodles.
吃完早餐后她就出门上班了。
Chīwán zǎocān hòu tā jiù chūmén shàngbān le.
After finishing breakfast, she left for work.