I have a lot of work to catch up on.

我有许多工作要补做。

《牛津词典》

The incentive is equal to 25 percent of a teacher’s total salary. It’s given to teachers who work nine extra hours in the afternoons, helping students who are behind catch up on their work.

每位教师所获得的奖励额度相当于其薪金总额的四分之一，奖励的对象是那些在下午额外工作9小时、帮助成绩较差的学生补习功课的教师。

youdao

I have to catch up on my work so I can't come out.

我得抓紧做我的工作，因此我不能出来。

youdao

I'm really tired and I have a lot of school work to catch up on.

我真是累坏了，我还有许多落下的功课得补起来。

I'd like 实战 - SpeakingMax英语口语达人

Evenings without homework duties provide the opportunity to catch up on work, read a book or browse the Internet before bed.

FORBES: Tiger Yes. Mom? No Thank You.

The most common activity was checking email 71% reported doing this but 30% said they participated in conference calls, and 44% said they use these nominal days off to catch up on work.

WSJ: Stress at Work: Why Women Feel It More Than Men

This past Saturday I sat down to catch up on some work while my two-year-old napped.

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