二 vs 两: The Two Words for “Two” in Chinese

Why this trips learners up

Chinese has two words for “two”, and choosing the wrong one is one of the most common beginner slips. 二 (èr) is the digit — the “2” you use for counting (一, 二, 三…), phone numbers, ordinals (第二, “second”), and labels like 二楼 (“2nd floor”) and 二月 (“February”).

两 (liǎng) is for “two of something”, and it almost always comes with a measure word: 两个人 (“two people”), 两本书 (“two books”), 两点 (“2 o'clock”), 两个月 (“two months”). The simple test: if a measure word is about to follow, use 两; if you're just reciting a number or naming a position, use 二. (Watch the classic pair: 二月 is “February”, but 两个月 is “two months”.)

The structure

两 liǎng Measure wordObject

Colour key

Each colour marks one grammatical role — and the same colour means the same role on every page in the Lab.

Pattern Subject Verb Object Place Function word Measure word

Examples in context

Real-world sentences, easiest first. Toggle pinyin or the translation, tap any word to see its role, or play the audio.

Tap a word to see its grammatical role.

wǒ de fángjiān 我的房间 Subject zài 在 Verb èr 二 Pattern lóu 楼 Place

My room is on the second floor.

wǒ 我 Subject xiǎng 想 Function word diǎn 点 Verb liǎng 两 Pattern gè 个 Measure word cài 菜 Object

I'd like to order two dishes.

zhè 这 Subject shì 是 Verb wǒ 我 Subject dì-èr 第二 Pattern cì 次 Measure word lái 来 Verb Běijīng 北京 Object

This is my second time in Beijing.

wǒ 我 Subject yǒu 有 Verb liǎng 两 Pattern zhī 只 Measure word māo 猫 Object

I have two cats.

wǒmen 我们 Subject děng 等 Verb le 了 Function word liǎng 两 Pattern gè 个 Measure word xiǎoshí 小时 Object

We waited two hours.

wǒmen 我们 Subject liǎng 两 Pattern diǎn 点 Measure word kāihuì 开会 Verb

We have a meeting at two o'clock.

zhè jiàn yīfu 这件衣服 Subject yìbǎi èrshí 一百二十 Pattern kuài 块 Measure word

This shirt is 120 kuai.

zhè tái diànnǎo 这台电脑 Subject liǎng 两 Pattern qiān 千 Measure word kuài 块 Measure word

This computer is 2,000 kuai.

Common mistakes

Avoid: 我要二个。 wǒ yào èr gè.

Say this: 我要两个。 wǒ yào liǎng gè.

Why it happens: Before a measure word, “two” is 两, not 二. “Two of them” is 两个, never 二个. This is the rule that catches everyone — the moment a measure word (个, 本, 杯…) follows, switch to 两.

Avoid: 第两课 dì-liǎng kè

Say this: 第二课 dì-èr kè

Why it happens: Ordinals use the digit 二. “The second lesson” is 第二课 — 第 + the number — so it can't be 两. Same for 第二次 (“the second time”), 二月 (“February”), 二号 (“the 2nd”).

Avoid: 现在二点。 xiànzài èr diǎn.

Say this: 现在两点。 xiànzài liǎng diǎn.

Why it happens: Telling the time trips people up: 2 o'clock is 两点, not 二点 — it's “two (of the) hour-marks”, a quantity. (But 12 o'clock is 十二点 — the 二 inside a bigger number stays 二.)

Compare & contrast

二 (èr) — the digit “2”	两 (liǎng) — “two of” (+ measure word)	The difference
二十èrshí	两个liǎng gè	二 for counting and bare numbers (二十 = 20). 两 the moment you count things (两个 = two [items]).
第二dì-èr	两次liǎng cì	Ordinals take 二 (第二 = second). “Two times” is a quantity, so 两次.
二月èryuè	两个月liǎng gè yuè	二月 is February — month number two. 两个月 is a span of two months. Same “two”, different word.

Rule of thumb二 is the digit “2” — counting, phone numbers, ordinals (第二), labels (二楼, 二月). 两 means “two of something” and pairs with a measure word (两个, 两本, 两点, 两个月). If a measure word follows, it's 两; if it's a bare number or a position, it's 二.

Try it yourself

Say “I'd like two cups of coffee” — tap the words into order.

Related patterns

Quick reference card

二 vs 两: The Two Words for “Two” grammar.merrymandarin.com

A pocket summary — print it and keep it by your desk.

Structure

两 + Measure word + Object

Example

我的房间在二楼

My room is on the second floor.

Watch out

✗ 我要二个。 → ✓ 我要两个。