tā / huā / le / hěn / duō / shí / jiān / bāng / máng / jié / guǒ / què / fèi / lì / bù / tǎo / hǎo

他花了很多时间帮忙，结果却费力不讨好。

He spent a lot of time helping, but in the end it was a thankless effort.