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Prefixes: changing meaning - Bài tập trắc nghiệm

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Tri Duc English - Unit 69
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TRI ĐỨC ENGLISH

2026 • Pre-Intermediate

UNIT 69

PREFIXES: CHANGING MEANING

LÝ THUYẾT TỪ VỰNG

A. With adjectives (Tiền tố với tính từ)

Prefixes, e.g. un-, dis-, im-, can be added to some adjectives to give the opposite meaning.

happyunhappy
possibleimpossible
regularirregular
honest [tells the truth]dishonest
correct [right ✔]incorrect
legal [allowed by law]illegal
  • • Dan used all the milk but said he didn't; he's very dishonest.
  • • I got eight answers right, but two were incorrect.
  • • It's illegal in the UK to ride a motorbike without a helmet.

B. un-

Of the prefixes above, un- is the most common, and appears in a number of adjectives.

  • • This chair is incredibly uncomfortable.
  • • It was unnecessary for them to wait for us.
  • • Xerxes – that's a very unusual name. [different, not common or ordinary]
  • • I won the game; it was completely unexpected. [I didn't think I was going to win]
  • • Marsha's hat is unbelievable. [surprising because it is either very good or very bad]
  • • We tried to open the door, but we were unable to get in. [could not]
  • • I need to do more exercise; I'm very unfit. [not healthy and not in good condition]
  • • Carrick played well, and I thought he was unlucky to lose.
  • • They're unlikely to get here before midday. [They probably won't get here before midday]
  • • The test was unfair because some of the students had more time to do it than others. [does not treat people equally]

LANGUAGE HELP

Adding a negative prefix does not usually change the pronunciation; the stress stays the same.
She was un'lucky. It's unbe'lievable. (NOT She was 'unlucky. It was 'unbelievable.)

C. With verbs (Tiền tố với động từ)

With some verbs, these prefixes can have particular meanings.

dis-
[the opposite of something]		 I disagree with the others. [don't agree / have the same opinion]
The plane appeared in the sky, then it disappeared behind a cloud.
un-
[the opposite of an action]		 I couldn't unlock the door this morning. [open the door using a key; opp lock]
We had to get undressed in the cold. [take off our clothes; opp get dressed]
I unpacked the bags. [took everything out of the bags; opp pack]
over-
[too much]		 The bank overcharged me. [asked me to pay too much money]
mis-
[do something incorrectly]		 I misunderstood what he said; I'm afraid my English isn't very good.
I misheard her. I thought she said Rita, not Brita.
re-
[again]		 The teacher has asked me to rewrite my essay.
Câu hỏi trắc nghiệm
Trắc nghiệm
Câu 1 She arrived home.
Câu 2 She's not here now.
Câu 3 She got to the hotel.
Câu 4 After I paid, I looked at the price.
Điền từ
Câu 5 Write the opposite of 'happy': ______
Câu 6 Write the opposite of 'able': ______
Câu 7 Write the opposite of 'correct': ______
Câu 8 Write the opposite of 'usual': ______
Câu 9 Write the opposite of 'possible': ______
Câu 10 Write the opposite of 'comfortable': ______
Câu 11 Write the opposite of 'agree': ______
Câu 12 Write the opposite of 'necessary': ______
Câu 13 Write the opposite of 'regular': ______
Câu 14 Write the opposite of 'honest': ______
Câu 15 Write the opposite of 'fair': ______
Câu 16 Write the opposite of 'lucky': ______
Câu 17 A: Mireille is a strange name. B: Yes, very ______ .
Câu 18 A: It's against the law, isn't it? B: Oh yes, it's ______ .
Câu 19 A: You mean he took off all his clothes! B: Yes, he got completely ______ .
Câu 20 A: He probably won't get back in time for the meeting. B: I agree. It's very ______ .
Câu 21 A: A lot of the answers were wrong. B: Yes, I'm afraid they were nearly all ______ .
Câu 22 A: He doesn't look in very good condition; he's a bit overweight. B: I know. He looks terribly ______ .
Câu 23 A: Nobody thought this would happen. B: Yes, it was completely ______ .
Câu 24 A: They never tell the truth. B: I know. They're both ______ .
Câu 25 A: His business always seems to lose money, and it's not his fault. B: I know. He's very ______ .
Câu 26 A: Ann always gives more attention to Sarah than she does to Lucas. B: Yes, it's very ______ on poor Lucas.
Câu 27 Write the opposite of 'pleasant': ______
Câu 28 Write the opposite of 'kind': ______
Câu 29 Write the opposite of 'patient (adj)': ______
Câu 30 Write the opposite of 'suitable': ______
Câu 31 Write the opposite of 'like (v)': ______
Câu 32 Write the opposite of 'do up': ______
Câu 33 Write the opposite of 'fashionable': ______
Câu 34 Write the opposite of 'reliable': ______
Câu 35 Write the opposite of 'friendly': ______
Câu 36 Write the opposite of 'tidy': ______
Câu 37 Write the opposite of 'ability': ______
Câu 38 Write the opposite of 'sociable': ______
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