Breakdown of zhè cì kǎoshì zhìshǎo yào xiě sānshí gè jùzi, hěnduō rén zuìhòu xiě le chāoguò sìshí gè jùzi.
Used when counting nouns or when specifying a specific instance of a noun.
There are also classifiers for people, for bound items such as books and magazines, for cups/glasses, etc.
The classifier 个 is a general one that can be used for any of these.
Questions & Answers about zhè cì kǎoshì zhìshǎo yào xiě sānshí gè jùzi, hěnduō rén zuìhòu xiě le chāoguò sìshí gè jùzi.
次 is a measure word for occurrences / times (like “time” in “this time,” “next time”).
- 这次考试 literally = “this time (of) exam” → “this exam / this test.”
- Without 次, 这考试 sounds wrong in Chinese. Nouns like 考试 usually need a measure word when specified by 这/那/每 etc.
Other examples:
- 上次考试 = last exam
- 下次考试 = next exam
In 这次考试, 考试 is a noun: “exam / test.”
But 考试 can be both a verb and a noun:
- Verb: 明天要考试。= “We have an exam tomorrow / We’re going to take an exam tomorrow.”
- Noun: 这次考试很难。= “This exam is very difficult.”
In your sentence, because it follows the measure word 次, it must be functioning as a noun.
Literal breakdown:
- 至少 = at least
- 要 = “need to / be required to / must” (modal verb)
- 写 = write
- 三十个句子 = thirty sentences
So = “At least need to write thirty sentences.”