Word: 八成 (bāchéng) 八成 dictionary entry bāchéng eighty percent; most probably; most likely Full dictionary entry for 八成 Example sentences using 八成 2 sentences, showing page 1 of 1. 他们八成已经走了。 Tāmen bāchéng yǐjīng zǒule. They have probably already left. 天这么黑，八成要下雨了。 Tiān zhème hēi, bāchéng yào xiàyǔle. The sky is so dark, so it will most probably rain.