Prefix Worksheets to Practice Un- Re- Dis- Pre- In- - Free Printable

Task Explanation:

The task involves converting adjectives into their negative forms by adding appropriate prefixes. The prefixes provided are un-, in-, im-, and dis-. Each prefix is used to negate the meaning of the adjective it precedes.

Solution:

Let's solve each sentence step by step:

1. I was very ………… (happy) when I heard I had to stay home during winter holidays.
- Adjective: happy
- Prefix: un-
- Negative form: unhappy
- Sentence: I was very unhappy when I heard I had to stay home during winter holidays.

2. The message I gave is ………… (important) anymore.
- Adjective: important
- Prefix: un-
- Negative form: unimportant
- Sentence: The message I gave is unimportant anymore.

3. I hate people who are ………… (honest) and keep lying.
- Adjective: honest
- Prefix: dis-
- Negative form: dishonest
- Sentence: I hate people who are dishonest and keep lying.

4. During the test I had only 2 sentences ………… (correct).
- Adjective: correct
- Prefix: in-
- Negative form: incorrect
- Sentence: During the test I had only 2 sentences incorrect.

5. That chair is very ………… (comfortable)! My back aches.
- Adjective: comfortable
- Prefix: un-
- Negative form: uncomfortable
- Sentence: That chair is very uncomfortable! My back aches.

6. It was very ………… (pleasant) of you not to invite her.
- Adjective: pleasant
- Prefix: un-
- Negative form: unpleasant
- Sentence: It was very unpleasant of you not to invite her.

7. It is ………… (possible) to climb that mountain without a specialist equipment.
- Adjective: possible
- Prefix: im-
- Negative form: impossible
- Sentence: It is impossible to climb that mountain without a specialist equipment.

8. I found the film ………… (interesting) and very boring!
- Adjective: interesting
- Prefix: un-
- Negative form: uninteresting
- Sentence: I found the film uninteresting and very boring!

9. The teacher was ………… (regarded) by his students so he had to give them some penalty homework.
- Adjective: regarded
- Prefix: dis-
- Negative form: disregarded
- Sentence: The teacher was disregarded by his students so he had to give them some penalty homework.

10. Poland became ………… (dependent) again in 1918 after 123 years.
- Adjective: dependent
- Prefix: in-
- Negative form: independent
- Sentence: Poland became independent again in 1918 after 123 years.

11. In the USA it is becoming ………… (popular) to smoke at work.
- Adjective: popular
- Prefix: un-
- Negative form: unpopular
- Sentence: In the USA it is becoming unpopular to smoke at work.

12. Richard died yesterday. He had always led an ………… (healthy) way of life.
- Adjective: healthy
- Prefix: un-
- Negative form: unhealthy
- Sentence: Richard died yesterday. He had always led an unhealthy way of life.

13. This umbrella is very ………… (practical). It so big you have no place to keep it!
- Adjective: practical
- Prefix: impr-
- Negative form: impractical
- Sentence: This umbrella is very impractical. It so big you have no place to keep it!

14. Huge sun glasses are ………… (fashionable) nowadays.
- Adjective: fashionable
- Prefix: unf-
- Negative form: unfashionable
- Sentence: Huge sun glasses are unfashionable nowadays.

15. It was ………… (usual) to watch the eclipse of the sun.
- Adjective: usual
- Prefix: un-
- Negative form: unusual
- Sentence: It was unusual to watch the eclipse of the sun.

16. You can write an ………… (formal) letter. He’s your uncle, isn’t he?
- Adjective: formal
- Prefix: informal
- Negative form: informal
- Sentence: You can write an informal letter. He’s your uncle, isn’t he?

17. John is behaving very ………… (mature) today, as if he was 15, not 22.
- Adjective: mature
- Prefix: im-
- Negative form: immature
- Sentence: John is behaving very immature today, as if he was 15, not 22.

18. The attempt to cross the earth with a balloon without landing turned out ………… (successful) at the first time.
- Adjective: successful
- Prefix: un-
- Negative form: unsuccessful
- Sentence: The attempt to cross the earth with a balloon without landing turned out unsuccessful at the first time.

Final Answer:

\boxed{
\begin{aligned}
1. & \text{unhappy} \\
2. & \text{unimportant} \\
3. & \text{dishonest} \\
4. & \text{incorrect} \\
5. & \text{uncomfortable} \\
6. & \text{unpleasant} \\
7. & \text{impossible} \\
8. & \text{uninteresting} \\
9. & \text{disregarded} \\
10. & \text{independent} \\
11. & \text{unpopular} \\
12. & \text{unhealthy} \\
13. & \text{impractical} \\
14. & \text{unfashionable} \\
15. & \text{unusual} \\
16. & \text{informal} \\
17. & \text{immature} \\
18. & \text{unsuccessful} \\
\end{aligned}
}