Common English mistakes Thai speakers make, and how to fix them
If your first language is Thai, many of your English mistakes follow Thai grammar and Thai sounds: verbs that never change form, no articles, no plural endings, and only a few consonants allowed at the end of a syllable. Linguists call this transfer. It is not carelessness, and once you know which Thai habit is behind a mistake, it is much easier to catch.
Ten to know. 1) Final consonants swapped or left out: "bin" for "bill", "but" for "bus". 2) Missing -s and -ed: "two book", "she work", "I walk yesterday" → "two books", "she works", "I walked yesterday". 3) A time word in place of a verb change: "I eat already" (แล้ว) → "I've already eaten". 4) "Have" for "there is" (มี): "Have many people" → "There are a lot of people". 5) "He" and "she" mixed up, because เขา (khao) is used for both. 6) "Open the light" and "close the light" (เปิด, ปิด) → "turn on the light" and "turn off the light". 7) "Very" in front of a verb: "I very like it" → "I really like it". 8) Questions without a helper verb: "Where you go?" → "Where are you going?" 9) Sounds: r said as l, v as w, sh as ch ("chip" for "ship"), th as t ("tink" for "think"), and final clusters cut short ("firs" for "first"). 10) Stress moved to the last syllable: "cof-FEE" for "COF-fee", "shop-PING" for "SHOP-ping".
Reading a list is only the first step. What helps is saying the sentence out loud, seeing the fix and saying it again. Airi is a voice AI partner for that: you talk, she answers out loud, shows one small fix at a time and keeps the conversation going. The sections below give the Thai behind more of these mistakes, how to make the difficult sounds, and a short routine for practicing them. Free to start.
A quick example with Airi
Thai-to-English mistakes, and the Thai behind each one
| Thai-influenced English | Natural English | The Thai behind it |
|---|---|---|
| I have ever been to Japan. | I've been to Japan. | เคย (khoei) marks past experience and is usually translated as "ever". English uses "ever" mainly in questions ("Have you ever been to Japan?") and leaves it out of a positive answer. |
| I play phone before I sleep. | I use my phone before I go to sleep. | เล่น (len) means to play, and also to do or use something for fun: a phone, the internet, social media. In English you "use" your phone or are "on" it. |
| Are you boring? | Are you bored? | Thai marks the difference at the front of the word: เบื่อ (buea) is the feeling and น่าเบื่อ (na buea) is the thing that causes it. English marks it at the end: -ed for how you feel, -ing for what causes the feeling. |
| I'll send you to the airport. | I'll take you to the airport. | ส่ง (song) means both to send and to drop someone off. In English, "send" means the other person goes without you. If you go along, you "take" them or "drop them off". |
| The food delicious very much. | The food is really delicious. | A Thai adjective works as a verb, so there is no "is", and มาก (mak) comes after it: อร่อยมาก is word for word "delicious very". |
| I eat medicine after dinner. | I take my medicine after dinner. | กิน (kin) covers eating, drinking and taking medicine: กินยา is word for word "eat medicine". In English you "take" medicine, even when you swallow it. |
| These two are same same. | These two are the same. | Thai often repeats a word, written with the mark ๆ, as in เหมือน ๆ กัน ("alike"). English says the word once and puts "the" in front of "same". |
Thai time words and the English verb forms they map to
A Thai verb never changes its form; time comes from a marker word or from context. In English the verb itself has to show the time in every sentence, even when "yesterday" has already said it.
| Thai marker | English form | Example |
|---|---|---|
| แล้ว (laeo), already done | Simple past, or present perfect when the result matters now | "I ate at noon." "I've already eaten." |
| เคย (khoei), past experience | Present perfect for experience, "used to" for a past habit | "I've tried it once." "I used to live near the beach." |
| ยังไม่ (yang mai), not yet | Present perfect negative with "yet" | "I haven't eaten yet." |
| กำลัง (kamlang), in progress | be + -ing | "I'm cooking right now." |
| จะ (cha), still to come | "will" or "be going to" | "I'm going to call her tonight." |
Articles, plurals, subjects and polite requests: where Thai and English grammar differ
- Articles. Thai has no "a" or "the". A working rule: a singular countable noun needs a word in front of it, such as "a", "the", "my" or "this". Use "a" the first time you mention something ("I bought a phone") and "the" once the listener knows which one ("The phone was expensive").
- Plurals. Thai counts with a number and a classifier, as in หมาสามตัว, word for word "dog three body", and the noun stays the same. In English the noun itself changes: "three dogs".
- Subjects. Thai leaves out "I", "you" and "it" when the context makes them clear: ร้อนมาก is word for word "hot very". English needs a subject even when it points to nothing in particular: "It's very hot."
- Polite requests. Thai makes a sentence polite with ครับ (khrap) or ค่ะ (kha) at the end. English has no particle that does this, so "Give me water" sounds like an order. Build the politeness into the request itself: "Could I have some water, please?"
English sounds that are hard for Thai speakers, and how to make them
A Thai syllable can end in only a few sounds: p, t, k, m, n, ng, or a glide like the end of "my" and "now". Other English endings get swapped for one of these or dropped. A Thai accent is fine. These swaps are worth fixing because they turn one word into another.
| Sound | Listeners may hear | How to make it | Words to drill |
|---|---|---|---|
| Final s in "bus" | "but" | Thai reads a final ส as t. Do not stop the air with your tongue; let the hiss run to the end. | but / bus |
| The ending of "like", "white", "house" | "lie", "why", "how" | In a Thai syllable the glide already fills the final slot, so the consonant after it disappears. Finish the vowel, then add the consonant. | lie / like |
| Final l in "tell" | "ten" | Thai reads a final ล as n. Keep the tongue tip behind the top teeth and let the air pass around its sides, not through the nose. | main / mail |
| v in "vest" | "west" | Rest your top teeth on your lower lip and keep your voice on. For w, the lips round and the teeth stay off them. | wine / vine |
| r in "right" | "light" | For r, the tongue tip touches nothing; for l, it presses behind the top teeth. In casual Thai ร is often said as ล, and the habit carries over. | fly / fry |
| sh in "share" | "chair" | Thai has no sh, so ch takes its place. Do not tap the tongue at the start; keep the air flowing, as in "shh" for quiet. | cheap / sheep |
| th in "three" | "tree" | Put the tongue tip lightly between your teeth and let the air flow over it. For t, the tongue blocks the air first. | tank / thank |
| s + consonant in "sport" | "support" | Thai words do not begin with s + consonant, so a small vowel slips in. Hold "sss" and go straight into the next sound. | stop, school, speak |
Thai-English words that mean something else in English
Thai borrowed these words from English and gave them new meanings. They feel safe to use in English, and then the listener hears something else.
| Thai-English word | What it means in Thai | Say instead |
|---|---|---|
| fan (แฟน) | Boyfriend, girlfriend or spouse | "This is my boyfriend." In English a fan is an admirer. |
| fitness (ฟิตเนส) | A gym | "I go to the gym after work." |
| air (แอร์) | An air conditioner | "Could you turn on the air conditioning?" |
| check bill (เช็คบิล) | Asking to pay at a restaurant | "Could we have the check, please?" |
| American share (อเมริกันแชร์) | Everyone pays their own part | "Let's split the check." |
| over (โอเวอร์) | Exaggerated, too much | "That's a bit over the top." "You're exaggerating." |
| in trend (อินเทรนด์) | Fashionable | "That style is in fashion right now." |
| fit (ฟิต), for clothes | Too tight | "These jeans are too tight." In English, clothes that fit are the right size. |
An Airi drill routine for Thai speakers
Airi does not rate your pronunciation, so drill the sound pairs above with a voice recorder. Her part is the conversation: questions that bring a Thai pattern to the surface, and one small fix at a time when it slips out. The free credits cover about eight minutes of speaking, so take one pattern per session.
- Set the target first: "Thai is my first language. Please point out missing articles and wrong verb forms."
- For เคย, say: "Ask me five 'Have you ever ...?' questions, one at a time." Answer without "ever": "Yes, I've been there twice."
- For แล้ว, tell her about yesterday from morning to night, with every verb in a past form: "I got up at six, took the train and had lunch at my desk."
- For final s, describe a friend's routine: "She works at a bank. She takes the train." Airi may not notice a dropped s, so record this one and listen for the hiss yourself.
- For polite requests, ask her to role-play a restaurant where you are the customer, and order with "Could I have ...?"
- When a small fix appears, say the corrected sentence out loud once, then carry on with your answer.
How to get the most from it
Let the last sound be heard
Say "bus", "five" and "walked" slowly and finish each word. Record yourself and listen for the ending.
"There is" and "there are", not "have"
"Have many people" → "There are a lot of people." Keep "have" for when someone has something: "I have a question."
Learn where each word's stress falls
Thai stresses the last syllable. English moves the stress around: TAX-i, com-PU-ter, ho-TEL. Check a new word's stress in a dictionary.
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