To work like a dog 工作很努力
e.g. I’m too old to work like a dog. 我年纪大了干不动了。
e.g. I worked like a dog all summer to earn enough cash to buy my guitar, and it was all worth it. 我真个夏天都很努力干活就是为了能赚够钱买我这个吉他,付出的辛苦很值得!
英语从头学