Questions & Answers about jīntiān de gōngzuò méiyǒu zuótiān nàme máng.
的 is linking 今天 (today) and 工作 (work) to make a noun phrase: 今天的工作 = today’s work.
- Structure: [time word] + 的 + [noun] → “the [noun] of [time]”
- 今天的工作 = today’s work
- 昨天的天气 = yesterday’s weather
Without 的, 今天工作 is still understandable and also commonly said, but 今天的工作 is slightly more “noun‑y” and can sound a bit more specific/formal, like “the work for today” as a unit.
Here the structure is different:
- 今天的工作 → 今天 (today) modifies 工作 (work), a noun → so we use 的.
- 昨天那么忙 → 昨天 (yesterday) modifies the whole state 那么忙 (that busy), which is an adjective phrase, not a noun.
Time words before adjective/verb phrases normally do not take 的:
- 我昨天很忙。= I was busy yesterday. (correct)
*我昨天的很忙。 (wrong)
So:
- 今天的工作 = a noun phrase (today’s work).
- 昨天那么忙 = a whole situation (being that busy yesterday), no 的 needed.