American Diploma · ACT · English: Usage

Comparatives and Superlatives

Two things or three? Comparative vs superlative, no double forms, irregular words, fewer/less, between/among, as … as and logical comparisons — taught for the ACT with worked items and a 10-question quiz.

American Diploma › ACT English and Reading — Complete Course

Comparison errors are small — one word, sometimes one ending — but they appear in many ACT essays because writers compare things all the time: two products, three cities, last year and this year. This lesson covers every comparison rule the test uses: comparative vs superlative, double comparisons, irregular forms, fewer vs less, between vs among, *as … as*, and the subtle ones — comparing like with like and *than any other*.

What this question type tests

Comparison questions are usage questions in Conventions of Standard English, which is 38–43% of the 40 scored ACT English questions (together with punctuation and sentence structure). The format is the usual one: an underlined portion, four choices, usually NO CHANGE first. A vertical scan of the choices tells you the type: larger / largest / more large / more larger, fewer / less, between / among, as / than.

Your method: count the things being compared and check what kind of noun follows. Most comparison items are solved by those two checks.

Rule 1: Two things → comparative; three or more → superlative

Comparing…	Form	✓ Example
two things	-er or more (comparative)	Of the two routes, the coastal road is shorter.
three or more	-est or most (superlative)	It is the shortest of the three routes.
two things, with the	the + comparative	Karim is the taller of the twins.
one thing vs all the rest	superlative	Aswan has the hottest summer of any city we visited.

Which ending? One-syllable adjectives take -er/-est (tall, taller, tallest). Two-syllable adjectives ending in -y change y to i (busy, busier, busiest; easy, easier). Most other adjectives of two or more syllables use more/most (more careful, most expensive). Adverbs ending in -ly use more/most (more quickly, most carefully).

✗ Wrong	✓ Right	Why
Of the two candidates, Mona is the most qualified.	…Mona is the more qualified.	only two candidates
Of all the planets, Jupiter is the larger.	…Jupiter is the largest.	many planets
Between tea and coffee, I like tea best.	…I like tea better.	only two drinks
This exam was difficulter than the last one.	…more difficult than…	long adjective → more
She finished quicklier than her brother.	…more quickly than…	-ly adverb → more

Rule 2: Never double a comparison

Use either the ending or the word more/most — never both, and never more/most with an irregular form.

✗ more better → ✓ better
✗ most fastest → ✓ fastest
✗ more easier → ✓ easier
✗ more worse → ✓ worse
✗ the most best → ✓ the best
Absolute adjectives (unique, perfect, complete, equal) describe something that cannot have degrees in careful writing. ✗ The design is very unique / more unique. ✓ The design is unique. If a choice adds *more* or *very* to such a word and another choice is plain, the plain one is safer on the ACT.

Rule 3: Learn the irregular forms

Base	Comparative (two)	Superlative (three+)	Notes
good (adj.) / well (adv.)	better	best	✗ gooder, ✗ more good, ✗ more better
bad (adj.) / badly (adv.)	worse	worst	✗ badder, ✗ worser, ✗ more worse
many (countable) / much (uncountable)	more	most	many books · much water
little (amount)	less	least	less time, the least effort
far — physical distance	farther	farthest	We walked farther than planned.
far — degree, extra, figurative	further	furthest	further research, further questions

farther vs further — the memory trick: farther contains *far*, so use it for real distance you could measure. Further means *more / additional / to a greater degree*: "After further discussion, the plan was approved." ✗ "After farther discussion." When the sentence is about distance, the ACT treats *farther* as the safe answer.

اتنين ولا أكتر؟

عد الحاجات اللي بتتقارن. لو اتنين: er أو more (better, larger). لو تلاتة أو أكتر: est أو most (best, largest). وماتجمعش الاتنين أبدًا: more better غلط. وخلي بالك من الشاذ: good–better–best و bad–worse–worst.

Rule 4: fewer vs less, many vs much, number vs amount

Ask: can I count it? If you can put a number in front of the noun (three cars, ten mistakes), it is countable. If not (water, traffic, time, information), it is uncountable.

Countable nouns (plural)	Uncountable nouns
fewer cars, fewer mistakes	less traffic, less water
many students	much homework
a large number of visitors	a large amount of rain
fewer than twenty people	less than twenty litres (one amount — see the note below)

✗ The new road has less accidents. → ✓ The new road has fewer accidents.
✗ We had fewer rain this year. → ✓ We had less rain this year.
✗ a large amount of tourists → ✓ a large number of tourists
Subtle case: numbers that describe a single amount of time, money, distance or weight take *less*: ✓ The trip took less than two hours. ✓ It costs less than fifty pounds. You are thinking of one amount of time or money, not separate hours or pounds.
Quick check: if you could say *fewer* + a plural noun you can count one by one, do it: fewer items, fewer calories, fewer errors.

Rule 5: between vs among

between = two people or things: ✓ The prize was shared between the two finalists. ✓ between you and me
among = three or more, as a group: ✓ The work was divided among the five volunteers. ✓ a favourite among students
✗ The tension between the members of the large committee grew. → ✓ among the members (a group of many)
✗ Choose between the four options. → ✓ Choose among the four options. (ACT rule: two → between, three or more → among.)

Rule 6: as … as, so … that, and the …, the …

Structure	✓ Right	✗ Wrong
as + adjective + as (equal)	The new phone is as light as the old one.	as light than the old one
not as/so … as (not equal)	Cycling is not as fast as driving.	not as fast than driving
comparative + than	faster than the bus	faster then the bus / faster as the bus
the + comparative, the + comparative	The more you read, the better you write.	The more you read, better you write.
so + adjective + that	The road was so narrow that buses could not pass.	so narrow as buses could not pass
as many (countable) / as much (uncountable)	as many tickets as · as much effort as	as much tickets as

Do not mix the two shapes. *as … as* is for equal things; *-er/more … than* is for unequal things. A choice like "as large or larger than" is incomplete; the full form is "as large as or larger than" — the ACT will usually offer a simpler correct choice instead.

Rule 7: Compare like with like

A comparison must be logical: you can compare a population with a population, not a population with a city. This is the hardest comparison item on the ACT because the wrong version sounds perfectly natural.

✗ Illogical	✓ Logical	What is compared
Cairo's population is larger than Alexandria.	Cairo's population is larger than Alexandria's / than that of Alexandria.	population vs population
The prices at the new shop are lower than the old shop.	…lower than those at the old shop.	prices vs prices (those = plural)
Her essay was longer than her classmates.	Her essay was longer than her classmates' essays / those of her classmates.	essay vs essays
Like other students, my grades improved.	Like other students, I improved my grades.	students vs a person

Use *that of* for a singular noun and *those of* for a plural noun. The climate of Aswan is drier than that of Cairo (that = the climate). The streets of Zamalek are quieter than those of downtown (those = the streets).

Rule 8: than any other

When you compare one member of a group with the rest of the group, add other or else, or the thing is compared with itself.

✗ The Nile is longer than any river in Africa. (The Nile is a river in Africa, so it would be longer than itself.) → ✓ longer than any other river in Africa.
✗ Ahmed scored higher than anyone in his class. → ✓ higher than anyone else in his class.
✓ The Nile is longer than any river in Europe. (No *other* needed: the Nile is not in Europe.)

قارن حاجة بحاجة من نفس النوع

ماينفعش تقارن population بمدينة. قول Cairo's population is larger than that of Alexandria. استخدم that of للمفرد و those of للجمع. ولو بتقارن حاجة بباقي مجموعتها قول any other. وكمان: fewer مع الحاجات اللي بتتعد (fewer cars) و less مع اللي مابتتعدش (less water)، و between لاتنين و among لتلاتة أو أكتر.

Worked examples

Each example is a sentence from an ACT-style essay. The underlined portion is shown in bold.

Worked example 1 — two vs three. "Our team tested three types of solar panel, and the thin black model produced the more electricity."