比較級與最高級: 8 Rules to Master Comparative Adjectives (2026)

“My English is more good than before.” Almost every Taiwanese learner has said a version of that sentence — and it is wrong twice over. The fix is one of the highest-value grammar points you can study, because comparative adjectives show up in interviews, emails, IELTS writing, and everyday small talk. Get the pattern right once and you stop making the single most common mistake teachers in Taiwan hear every week. This guide breaks down every rule, every spelling trap, and the five errors that cost points on tests — with bilingual examples you can copy today.

形容詞比較是英文課最早教、卻最常用錯的文法之一。

什麼是比較級與最高級？(What Are Comparative and Superlative Adjectives?)

Comparative adjectives compare exactly two things, and superlative adjectives compare three or more. “Taipei is bigger than Tainan” is comparative — two cities. “Taipei is the biggest city in northern Taiwan” is superlative — one city ranked above all others. The base form (big) is called the positive form; it makes no comparison at all.

The good news for Taiwanese learners: Chinese has no word endings, so you only need to memorise a handful of patterns rather than conjugate. 比較級用來比較「兩者」，最高級用來比較「三者以上」。Once you can hear how many syllables an adjective has, you already know which pattern to use about 90% of the time.

比較級規則：短形容詞加 -er (Comparative Rules for Short Adjectives)

For one-syllable adjectives, add -er for the comparative and follow it with than when you name the second thing. Tall → taller, fast → faster, cheap → cheaper, young → younger. The HSR is faster than the regular train. Yushan is higher than any peak in Japan. This pattern is the workhorse — most everyday comparisons in spoken English use it.

Notice that than is not optional grammar decoration; it is the word that tells the listener a comparison is happening. Drop it and the sentence collapses. “My phone is newer” is fine on its own, but the moment you mention the other phone, you need than: “My phone is newer than yours.”

One peak is higher than the next — comparative adjectives describe the difference between two things.

最高級規則：加 -est 與 the (Superlative Rules and “the”)

For the superlative of short adjectives, add -est and put 這 in front: tall → the tallest, fast → the fastest, cheap → the cheapest. Taipei 101 was once the tallest building in the world. The night market by my apartment has the cheapest beef noodles in the district.

That little word 這 trips up Taiwanese learners constantly. A superlative ranks one item above an entire group, so English marks it as specific with 這. The exception is when a possessive already does that job: you say “my best friend,” not “my the best friend,” because my already makes it specific. 最高級前面通常要加 the，但若前面已有所有格（my, his, our），就不再加 the。

「The best」只有一個——最高級永遠指向群體中的第一名。

拼字規則：-e、-y 與雙子音 (Spelling Rules You Cannot Skip)

Adding -er 和 -est is not always a clean copy-paste. Three spelling rules cover almost every short adjective, and missing them is an instant red mark on a writing test.

• Ends in -e: just add -r / -st. large → larger → largest, nice → nicer → nicest, safe → safer → safest.
• Ends in consonant + -y: change y to i. happy → happier → happiest, easy → easier → easiest, busy → busier → busiest.
• One vowel + one consonant: double the final consonant. big → bigger → biggest, hot → hotter → hottest, thin → thinner → thinnest.

The doubling rule is the one most Taiwanese writers forget, which produces “biger” and “hoter” — both wrong. If you see a single vowel hugged by a single consonant at the end (b-i-g), double that consonant before you add the ending.

把拼字規則寫三遍，比死背更容易記住。

兩個音節以上：用 more / most (Longer Adjectives Use more / most)

For adjectives with three or more syllables, and most two-syllable ones, you do not change the ending at all. Instead, put more before the word for the comparative and the most for the superlative. Expensive → more expensive → the most expensive. Beautiful → more beautiful → the most beautiful. Difficult → more difficult → the most difficult.

Two-syllable adjectives are the grey zone. Many work both ways: clever → cleverer / more clever, quiet → quieter / more quiet, simple → simpler / more simple. Both are accepted, so do not stress over the choice. But two-syllable words ending in -y almost always take -er/-est (happier, not “more happy”), and the rest lean toward more/most. When in doubt with a long word, more/most is the safer bet.

不規則比較級 (Irregular Comparatives and Superlatives)

A small set of high-frequency adjectives ignore every rule above. You simply have to memorise them, because they appear constantly — and getting good → better → best wrong is the fastest way to sound like a beginner. Here is the full list worth knowing:

One quick note on farther 對比 further: farther is for physical distance (Kaohsiung is farther than Taichung), while further is for figurative distance (we need further discussion). In casual speech most people use them interchangeably, and no Taiwanese examiner will fault you for it.

This cup is bigger than that one — the everyday comparisons you make in Chinese all have an English pattern.

than 的用法：比較級的關鍵字 (How to Use “than” Correctly)

The most common structure is subject + verb + comparative + than + second item. “Taipei is hotter than Taichung in summer.” Simple. The trouble starts with the pronoun at the end. Formal English wants a subject pronoun: “She is taller than I (am).” Spoken English overwhelmingly uses the object pronoun: “She is taller than me.” Both are understood; for the TOEIC and most workplace writing, “than me” is perfectly safe.

You can also stack a comparison to show change over time using 和: “Taipei is getting hotter and hotter every summer.” And to show cause and effect, English uses the elegant the + comparative, the + comparative pattern: “The more you practice, the better you get.” 越…越… in Chinese maps almost perfectly onto this English structure, which makes it one of the easiest advanced patterns for Taiwanese learners to pick up.

Taipei 101 is taller than every other tower in the city — and for years it was the tallest in the world.

台灣學生最常犯的 5 個錯誤 (5 Mistakes Taiwanese Learners Make)

After two decades in Taiwanese classrooms, the same handful of errors show up on nearly every worksheet. Fix these five and your comparative adjectives will already sound more natural than most intermediate speakers.

• Double marking (“more better”): Never combine more with an -er ending. It is “better,” not “more better”; “the fastest,” not “the most fastest.” Pick one method, never both.
• Using “than” with superlatives: Superlatives take 在 或者 of, not than. Write “the best student 在 the class,” not “the best student than the class.”
• Forgetting “the”: A superlative almost always needs 這. “She is best player” should be “she is 這 best player.”
• “more good” / “more bad”: These are irregular. It is better 和 worse — there is no such thing as “more good.”
• Comparing two things with a superlative: With only two items, use the comparative. “Of my two sisters, she is the older” (comparative), not “the oldest.”

The truth is, most of these mistakes come from translating Chinese word-by-word rather than hearing the English pattern. Read your comparison out loud — if you hear both “more” and “-er,” you already know to delete one.

進階用法：as…as 與 less / least (Advanced Comparisons)

English compares more than just “bigger” and “smaller.” To say two things are equal, use as + adjective + as: “Taichung is as expensive as Tainan for rent.” To say one thing is not equal, the negative form does the work: “My old phone is not as fast as my new one.” This as…as structure matches Chinese 跟…一樣 closely and is worth drilling for the IELTS speaking test.

To go in the opposite direction — less of a quality rather than more — use less for the comparative and the least for the superlative: “This route is less crowded than the MRT,” “December is the least humid month in Taipei.” Native speakers actually prefer flipping to a positive adjective when they can (“cheaper” sounds more natural than “less expensive”), but less/least is grammatically correct and useful when no opposite word exists.

從最高的大樓到最擁擠的街道——比較與最高級讓你精準描述城市。

影片教學 (Watch It Explained)

If you learn better by ear, this lesson from English with Lucy walks through the formation rules and pronunciation in clear, slow English — a useful pairing with the tables above.

常見問題 (Frequently Asked Questions)

比較級和最高級有什麼差別？(What is the difference between comparative and superlative?) Comparative adjectives compare two things and use -er 或者 more 和 than. Superlative adjectives compare three or more and use -est 或者 the most 和 這. Think two versus a whole group.

What is the comparative of “good”? (good 的比較級是什麼？) It is irregular: good → better → the best. Never write “more good” or “gooder.”

When do I use “more” instead of “-er”? Use more for adjectives of three or more syllables and most two-syllable words. Use -er for one-syllable words and two-syllable words ending in -y.

Do superlatives always need “the”? Almost always, unless a possessive (my, his, our) already makes the noun specific — then you drop 這.

結語 (Start Comparing Today)

Pick five adjectives you actually use — busy, expensive, happy, good, far — and write one comparative and one superlative sentence about your real life for each. That ten-minute drill will lock in the patterns faster than any worksheet, because your brain remembers sentences about your own city and your own job. For the full system behind English sentence building, work through our 英文文法完整指南 (Complete English Grammar Guide) next, then sharpen related skills with our guides to 冠詞 a/an/the 用法 和 助動詞 modal verbs.

來源

1. British Council — Comparative and Superlative Adjectives — formation rules and exercises.
2. Cambridge Dictionary Grammar — Comparison: Adjectives — syllable rules and spelling changes.
3. EF — The Comparative and the Superlative — irregular forms and usage notes.