Why Korean students say "more easy" instead of "easier": drilling comparative forms when Korean builds them differently

Korean builds all comparative adjectives the same way: put 더 in front. 더 크다, 더 작다, 더 쉽다—more big, more small, more easy. It works for every adjective, every time. English makes you memorise which adjectives take -er and which take more, and the sorting rule is syllable count, which Korean grammar does not care about at all.

So your students produce "more easy", "more fast", "more cheap" because that is exactly how their first language works. They are translating a system that is internally consistent in Korean into English, where the system splits down the middle for no reason they can see.

Why the split happens in English

One syllable: add -er. Two syllables ending in -y: swap the y for -ier. Two syllables otherwise, or three and up: use more. The student has to count syllables, check the ending, then pick the form. Korean does none of that. It is always 더 + adjective stem, done.

The mistake is not carelessness. It is transfer. They are applying the simpler rule from their first language, which happens to be wrong in yours.

What does not work

Telling them "it just sounds wrong" is useless, because it does not sound wrong to them yet. Giving them the syllable-count rule once and moving on also fails, because the rule has too many pieces to hold without repetition. They need to drill the forms in volume until the correct one comes out automatically.

Drill 1: Sort and shout

Write twenty adjectives on the board in random order. Mix one-syllable, two-syllable, and long ones. Students work in pairs. One reads the adjective, the other shouts the comparative form as fast as they can. If they get it wrong, the partner corrects and they repeat it three times aloud.

Start the clock. Two minutes, as many as they can get through. Swap roles and run it again.

The speed is the point. They do not have time to think about the rule consciously, so the pattern has to become automatic.

Drill 2: Comparison chains

Put students in groups of four. Give each group a stack of adjective cards face down. First student draws a card and makes a true comparison sentence about two people in the room: "Minji is taller than Junho." If the comparative form is wrong, the group corrects it and the student repeats the whole sentence.

Next student draws and builds on the last sentence: "Minji is taller than Junho, but Junho is funnier." The chain continues until someone breaks it with a wrong form or a false statement. That person is out. Last one standing wins the round.

Run three or four rounds with different card sets. By the third round most of the corrections will come from the students, not you.

Drill 3: Slow dictation with self-correction

Read ten sentences aloud, each with one comparative adjective. Students write what they hear. Do not repeat yourself.

When you finish, put the correct sentences on the board. Students check their own work and circle every comparative they got wrong. Then they copy out only the mistakes three times each in their notebook, saying the word aloud as they write.

This works because they are comparing their instinct (what they wrote first) against the correct form in print, then fixing their own output. The self-correction step is what sticks.

The words that trip them most

Drill these six hard in the first week. They cover the most common mistakes and the boundary cases—two syllables that do take -er (simple) and two syllables that take more (famous).

One fix that makes a real difference

Ban the phrase "more easy" aloud in your classroom for the whole term. Any time a student says it, the class stops, everyone says "easier" in unison, and the speaker repeats the correct sentence. Make it a reflex, not a lecture.

The goal is not to humiliate anyone. The goal is to overwrite one automatic phrase ("more easy") with another ("easier") through sheer repetition in context. After three weeks of this, most students will catch themselves mid-word.

You will still see "more easy" in writing at the end of term. But you will hear it much less, and that is where fluency starts.