Work 可當不可數和可數名詞用，兩者的意思有很大的不同。
Work 用作不可數名詞時意為「工作；勞動」，其前不可有表示單數的不定冠詞 a，也不可加 s 變成複數型。至於指特定職業的「工作」，或者是指經常性、不情願或很難做的「工作」，英文叫做 job，是個可數名詞。例如：
- My mom has got so much work to do every day. (我媽媽每天都有一大堆工作要做)
- We’ve got exams next week. I’ve got a lot of work to do. I’m not going out tonight. (我們下週要考試。現在我有許多作業要做/許多書要唸。今晚我不外出了)
- He’s applied for a job with a software company. (他已應徵一家軟體公司的工作) (正)
He’s applied for a work with a software company. (誤) - Mary spent the afternoon doing a lot of jobs around the house, like cleaning, washing clothes, gardening, and so on. (瑪麗下午在家裡做了許多雜務，如清掃、洗衣、園藝等等) (正)
Mary spent the afternoon doing a lot of works … (誤)