nǐ / zhè / jiàn / gōng jù / yòng / wán / le / jiù / gāi / huán / huí qù / jiǔ jiǎ bù guī / kě / bù hǎo

你这件工具用完了就该还回去，久假不归可不好。

You should return this tool after using it; failing to return what you borrowed is not good.