Mǎi vs Mài: The Classic Mandarin Tone Minimal Pair

The pair itself

Mǎi (买), third tone — a low, dipping pitch — means "to buy." Mài (卖), fourth tone — a sharp, falling pitch from high to low — means "to sell." Same initial consonant, same vowel, same everything except the tone. In a market or a shop, mixing them up doesn't produce nonsense; it produces the opposite transaction from the one you meant.

Why this specific pair is used to teach tone

A minimal pair isolates exactly one variable. Because mǎi and mài share every sound except tone, any confusion you have hearing or producing them is unambiguously a tone problem, not a consonant or vowel problem. That makes the pair a genuinely useful diagnostic: if you can reliably tell mǎi from mài, both by ear and by mouth, you've confirmed you can handle the third-tone/fourth-tone contrast specifically — a dipping tone against a falling one, which is a different (and for many learners, easier) contrast than Tone 2 vs. Tone 3.

Producing the contrast

• Mǎi (third tone): start around your mid pitch, drop to the bottom of your comfortable range, and — in isolation — let it rise back up slightly at the end.
• Mài (fourth tone): start near the top of your range and fall sharply and quickly to the bottom — it's the shortest, most abrupt of the four tones.
• Say them back to back, several times, at your own natural pitch. The contrast is in the shape and the starting height, not the specific frequency — which is exactly why practicing in your own register, rather than a stranger's, makes the pattern easier to internalize.

Other genuinely useful Mandarin minimal pairs to drill the same way: mā/má/mǎ/mà (mother/hemp/horse/scold — all four tones on one syllable) and tāng/táng/tǎng/tàng (soup/sugar/lie down/hot).