Consecutive-Number Approximation (两三个) | Chinese (Mandarin) Grammar

To say "two or three" or "fifty or sixty," Chinese simply sets two neighbouring numbers next to each other — 两三个, 五六十 — and the "or" is understood. There is no word for "or" anywhere in sight. This juxtaposition is one of the most efficient tricks in the language: where English needs three words ("two or three"), Chinese needs two syllables. Two rules keep it working: the digits must be adjacent and ascending, and a measure word still follows just as it would after a single number.

The core pattern: adjacent, ascending, measure word after

Pick any digit and the next one up, glue them together, and add the measure word: 两三个, 三四个, 七八个. The result is a soft range — "two-ish," "seven or eight" — used constantly in casual estimates.

我买两三个就够了。

wǒ mǎi liǎng-sān ge jiù gòu le

I'll buy two or three — that's enough. — 两三个, no 'or'.

教室里只有五六个人。

jiàoshì li zhǐ yǒu wǔ-liù ge rén

There are only five or six people in the classroom. — 五六个.

门口站着七八个人。

ménkǒu zhàn zhe qī-bā ge rén

Seven or eight people are standing at the door. — 七八个.

这本书我三四天就看完了。

zhè běn shū wǒ sān-sì tiān jiù kàn wán le

I finished this book in three or four days. — 三四天.

The same trick scales up to tens, hundreds and thousands — you pair the leading digits and let the place value ride along:

这台电脑要五六千块。

zhè tái diànnǎo yào wǔ-liù qiān kuài

This computer costs five or six thousand yuan. — 五六千.

这个小区有五六百户人家。

zhège xiǎoqū yǒu wǔ-liù bǎi hù rénjiā

This complex has five or six hundred households. — 五六百.

The 两 / 二 split for "two"

This is where learners slip. When "two" is the standalone count directly before a measure word (or before 百/千/万), it is 两, never 二 — so "two or three" is 两三个, and "one or two" is 一两个. But when "two" is the tens digit paired with 十, it reverts to 二: "twenty or thirty" is 二三十. This mirrors the general rule that 两 counts things while 二 fills number-internal slots (see 两 vs 二).

再等一两分钟就好了。

zài děng yì-liǎng fēnzhōng jiù hǎo le

Just wait a minute or two. — 一两, using 两 not 二.

现场来了二三十个记者。

xiànchǎng lái le èr-sān shí ge jìzhě

Twenty or thirty reporters showed up. — 二三十, with 二 before 十.

他一个月能挣两三万。

tā yí ge yuè néng zhèng liǎng-sān wàn

He earns twenty or thirty thousand a month. — 两三万, 两 before 万.

Range	Form	Pinyin	Which "two"
1–2	一两个	yì liǎng ge	一 + 两
2–3	两三个	liǎng-sān ge	两 (not 二)
5–6	五六个	wǔ-liù ge	—
7–8	七八个	qī-bā ge	—
20–30	二三十(个)	èr-sān shí ge	二 (before 十)
50–60	五六十	wǔ-liù shí	—
200–300	两三百	liǎng-sān bǎi	两 (before 百)

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Because the "or" is silent, the pattern only works with digits your listener can slot together instantly — that means adjacent (两三, not 两四) and ascending (三四, not 四三). A jump or a reversal breaks the reading: 二四个 doesn't say "two or four," it just sounds broken.

The 9–10 boundary and a couple of set phrases

The pattern has one honest gap: it cannot cross the 9→10 boundary, because 九十 (jiǔshí) already means "ninety." There is no juxtaposition for "nine or ten" — you must say 九个到十个 (jiǔ ge dào shí ge, "nine to ten") or just 差不多十个 ("about ten"). Keep the trick to pairs that stay on the same side of a round ten.

You will also meet two lexicalised pairs that bend the adjacent-ascending rule because they've frozen into idioms: 三五 (sān-wǔ, "a few," as in 三五成群 "in little clusters") and 三两 (sān-liǎng, "a couple," as in 三两天 "a couple of days"). Treat these as set expressions, not as models for building your own ranges.

他们三五成群地走在路上。

tāmen sān-wǔ chéng qún de zǒu zài lù shang

They walked along the road in little clusters. — 三五 as a fixed idiom.

Common Mistakes

1. Inserting 或 ("or") between the numbers. The whole point is that no "or" is spoken.

❌ 我买两或三个。

Incorrect — no 或 in this pattern; just juxtapose: 两三个.

✅ 我买两三个。

wǒ mǎi liǎng-sān ge

I'll buy two or three. — bare juxtaposition.

2. Using 二 before a measure word. "Two or three [things]" starts with 两, not 二.

❌ 桌上有二三个杯子。

Incorrect — before a measure word 'two' is 两: 两三个杯子.

✅ 桌上有两三个杯子。

zhuō shang yǒu liǎng-sān ge bēizi

There are two or three cups on the table. — 两三个.

3. Pairing non-adjacent numbers. The digits must be neighbours.

❌ 我请了二四个朋友。

Incorrect — 二四 isn't a valid range; pair adjacent digits, e.g. 三四个.

✅ 我请了三四个朋友。

wǒ qǐng le sān-sì ge péngyou

I invited three or four friends. — 三四个, adjacent.

4. Reversing the order (descending). The smaller digit comes first.

❌ 路上有四三个人。

Incorrect — must ascend: 三四个人.

✅ 路上有三四个人。

lù shang yǒu sān-sì ge rén

There are three or four people on the road. — ascending 三四.

Key Takeaways

Two adjacent, ascending digits side by side = "X or Y" — no word for "or": 两三个, 五六十, 七八个.
A measure word still follows the pair, exactly as after a single number.
"Two" is 两 before a measure word or 百/千/万 (两三个, 一两个, 两三百), but 二 as the tens digit (二三十).
The pattern can't cross a round ten — for "nine or ten" say 九个到十个 or 差不多十个.
三五 ("a few") and 三两 ("a couple") are frozen idioms, not templates for new ranges.

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