Word: 洞 These are the Chinese grammar articles about 洞, whether they focus on it or mention it. Example sentences using 洞 3 sentences, showing page 1 of 1. 他们正在挖一个洞。 Tāmen zhèngzài wā yí gè dòng. They're digging a hole. 他挖了一个洞。 Tā wāle yí gè dòng. He dug a hole. 这洞有多深啊? Zhè dòng yǒu duō shēn a? How deep is the hole?