Prefix // SuffixPrefix // SuffixPrefix // SuffixPrefix // Suffix

Prefix // SuffixPrefix // Suffix

Prefix (อปุสรรค)

คําที่เติมขางหนา และเมื่อเติมลงไปแลวจะทําใหความหมายเปลี่ยนแปลงไป

clean => uncleanclean => unclean

sure => ensure (adj. -> v.)

history => pre-history

Prefix // SuffixPrefix // Suffix

Suffix (ปจจยั)

คําที่ใสขางหลัง และเมื่อเติมลงไปแลวจะทําใหคําน้ันเปลี่ยนชนิดของคําไป

differ => different (v. -> adj.)differ => different (v. -> adj.)

expect => expectation (v. -> n.)

deep => deeply (adj. -> adv.)

ExerciseExerciseExerciseExercise

Prefix // Suffix

1. Penicillin is an ________ medicine, isn’t it?

Exercise

1. Penicillin is an ________ medicine, isn’t it? 1) anti-bacterial2) bacterial

Prefix // Suffix

1. Penicillin is an ________ medicine, isn’t it? 1. Penicillin is an ________ medicine, isn’t it?

Prefix // Suffix

2. Greg tried hard to solve that problem,

Exercise

2. Greg tried hard to solve that problem, but he was _______.1) unsuccess2) unsuccessful2) unsuccessful

Prefix // Suffix

2. Greg tried hard to solve that problem, 2. Greg tried hard to solve that problem,

Prefix // Suffix

3. It is ________ for a mother to leave her baby alone.

Exercise

3. It is ________ for a mother to leave her baby alone.1) wise2) unwise

Prefix // Suffix

3. It is ________ for a mother to leave her baby alone.3. It is ________ for a mother to leave her baby alone.

Prefix // Suffix

4. Julia is an ________ woman, so she can’t read and

Exercise

4. Julia is an ________ woman, so she can’t read and write.1. educated2. uneducated 2. uneducated

Prefix // Suffix

. Julia is an ________ woman, so she can’t read and . Julia is an ________ woman, so she can’t read and

Prefix // Suffix

5. Do you have an ________ in your office?

Exercise

5. Do you have an ________ in your office?1. interphone2. phone

Prefix // Suffix

. Do you have an ________ in your office?. Do you have an ________ in your office?

Prefix // Suffix

6. His plan is very difficult. I _________ to it.

Exercise

6. His plan is very difficult. I _________ to it.1. agree2. disagree

Prefix // Suffix

6. His plan is very difficult. I _________ to it.6. His plan is very difficult. I _________ to it.

Prefix // Suffix

7. if you sign your name wrong, you will _______ it.

Exercise

7. if you sign your name wrong, you will _______ it.1. write2. rewrite

Prefix // Suffix

. if you sign your name wrong, you will _______ it.. if you sign your name wrong, you will _______ it.

Prefix // Suffix

8. A large number of people like to go shopping at

Exercise

8. A large number of people like to go shopping at ________.1. market2. supermarket2. supermarket

Prefix // Suffix

. A large number of people like to go shopping at . A large number of people like to go shopping at

Prefix // Suffix

9. We ________ what he said

Exercise

9. We ________ what he said 1) believe2) disbelieve

Prefix // Suffix

. We ________ what he said because he is a liar.. We ________ what he said because he is a liar.

Prefix // Suffix

10. To kill human beings is ________.

Exercise

10. To kill human beings is ________.1. legal2. illegal

Prefix // Suffix

. To kill human beings is ________.. To kill human beings is ________.

Prefix // Suffix

11. Is there an ________ airport in your country?

Exercise

11. Is there an ________ airport in your country?1) nation2) international

Prefix // Suffix

. Is there an ________ airport in your country?. Is there an ________ airport in your country?

Prefix // Suffix

12. My mother was sometimes ________ with me

Exercise

12. My mother was sometimes ________ with me because I was very lazy at home.

1. impatient2. patience2. patience

Prefix // Suffix

. My mother was sometimes ________ with me . My mother was sometimes ________ with me was very lazy at home.

Prefix // Suffix

13. All kinds of microbes are _______ to the naked eye.

Exercise

13. All kinds of microbes are _______ to the naked eye.1) visible2) invisible

Prefix // Suffix

. All kinds of microbes are _______ to the naked eye.. All kinds of microbes are _______ to the naked eye.

Prefix // Suffix

14. Nobody likes Betty. She is

Exercise

14. Nobody likes Betty. She is 1) unpleasant2) pleasant

Prefix // Suffix

. Nobody likes Betty. She is the most ________ person.. Nobody likes Betty. She is the most ________ person.

Prefix // Suffix

15. He is very greedy, so we ________ him.

Exercise

15. He is very greedy, so we ________ him.1. like2. dislike

Prefix // Suffix

. He is very greedy, so we ________ him.. He is very greedy, so we ________ him.

Prefix // Suffix

16. The orchestra plays ______ today.

Exercise

16. The orchestra plays ______ today.

1) pleasantly2) pleasant2) pleasant3) please4) pleasantness5) pleasure5) pleasure

Prefix // Suffix

. The orchestra plays ______ today.. The orchestra plays ______ today.

Prefix // Suffix

17. The ______ of this project was backed up by Greg.

Exercise

17. The ______ of this project was backed up by Greg.

1) develop2) developed2) developed3) developing4) developer5) development5) development

Prefix // Suffix

. The ______ of this project was backed up by Greg.. The ______ of this project was backed up by Greg.

Prefix // Suffix

18. I was surprised at her _______ of me.

Exercise

18. I was surprised at her _______ of me.

1) recognize2) recognizing2) recognizing3) recognition4) recognizable5) recognizes5) recognizes

Prefix // Suffix

. I was surprised at her _______ of me.. I was surprised at her _______ of me.

Prefix // Suffix

19. Many American are uncomfortable with ________,

Exercise

19. Many American are uncomfortable with ________, and they tend to avoid

1) silence1) silence3) silences5) silently

Prefix // Suffix

. Many American are uncomfortable with ________, . Many American are uncomfortable with ________, avoid it in a conversation.

2) silent2) silent4) silencing

Prefix // Suffix

20. Your mother doesn’t allow you ______ to be away from

Exercise

20. Your mother doesn’t allow you ______ to be away from home this night to celebrate your friend’s birthday party.

1) insistent1) insistent2) insistently3) insistence4) insist4) insist5) insistency

Prefix // Suffix

allow you ______ to be away from allow you ______ to be away from home this night to celebrate your friend’s birthday party.

Prefix // Suffix

21. His handwriting was so messy, his teacher made him

Exercise

21. His handwriting was so messy, his teacher made him _______ his paper more neatly.1) write1) write2) writes3) rewrite4) rewrites4) rewrites5) rewrote

Prefix // Suffix

. His handwriting was so messy, his teacher made him . His handwriting was so messy, his teacher made him _______ his paper more neatly.

Prefix // Suffix

22. If you are confused or ________ about any information,

Exercise

22. If you are confused or ________ about any information, please ask me questions after the presentation.1) clear1) clear2) cleared3) unclear4) uncleared4) uncleared5) clearing

Prefix // Suffix

. If you are confused or ________ about any information, . If you are confused or ________ about any information, please ask me questions after the presentation.

Prefix // Suffix

23. Because we get paid __________ I won’t get another

Exercise

23. Because we get paid __________ I won’t get another paycheck until next week.1) biweek1) biweek2) biweekly3) biweeked4) biweeking4) biweeking5) biweeks

Prefix // Suffix

. Because we get paid __________ I won’t get another . Because we get paid __________ I won’t get another paycheck until next week.

Prefix // Suffix

24. She acted ________ even though she was very curious

Exercise

24. She acted ________ even though she was very curious about the new guy at work.1) interest2) interested2) interested3) uninterest4) uninterests4) uninterests5) uninterested

Prefix // Suffix

. She acted ________ even though she was very curious . She acted ________ even though she was very curious about the new guy at work.

Prefix // Suffix

25. The plane ran out of fuel __________.

Exercise

25. The plane ran out of fuel __________. 1) flight2) flights3) to flight3) to flight4) midflight5) midflights5) midflights

Prefix // Suffix

. The plane ran out of fuel __________. . The plane ran out of fuel __________.