Educational worksheet for practicing the prefix "re-" in English grammar.

Let's solve this grammar worksheet step by step. The task is to complete each sentence using the prefix "re-" with one of the words from the box, and use the correct tense form as needed.

Words in the Box:

- start
- do
- injure
- write
- heat
- enter
- dial
- schedule
- tell
- hire
- invent
- send
- adjust
- new
- use
- think

We'll go through each sentence and determine which word (with "re-" added) fits best.

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1. Our dinner is cold. Let’s put it into the microwave and ______ it.
→ We need to heat it again → reheat
✔ reheat

2. I played football too soon after I hurt my leg, so I think I’ve ______ my leg.
→ Hurt it again → reinjure
✔ reinjured (past tense)

3. My classmate’s student card is too old. She has to ______ the card.
→ Get a new one → renew
✔ renew

4. Don’t throw away that empty plastic bag. We can keep it and ______ it.
→ Use it again → reuse
✔ reuse

5. Mr. Smith didn’t get the email you sent yesterday. You’ll have to ______ it.
→ Send again → resend
✔ resend

6. I arrived in Canada last month, but now I have to leave and ______ the country.
→ Leave and return? No — probably means return → re-enter
But “enter” is in the list → re-enter
✔ re-enter

7. I already did my homework but my dog ate it. I have to ______ it.
→ Do again → redo
✔ redo

8. Unfortunately, I’ve scheduled two meetings for 3 o’clock. I’ll have to ______ one of the meetings.
→ Change time → reschedule
✔ reschedule

9. I wrote a story but I don’t like it. I want to ______ the ending.
→ Write again → rewrite
✔ rewrite

10. First, we listened to a story. Then, we ______ the story in our own words.
→ Tell again → retell
✔ retold (past tense)

11. My computer has a problem. I’m going to turn it off and then ______ it.
→ Turn on again → restart
✔ restart

12. Henry lost his job in January, but the company ______ him a few months later.
→ Hire again → rehire
✔ rehired (past tense)

13. My airplane seat isn’t comfortable. I want to ______ it and change the position.
→ Adjust again → readjust
✔ readjust

14. Oops! I just called the wrong number. I’ll have to ______ and try again.
→ Dial again → redial
✔ redial

15. We should ______ our decision to buy a car. Let’s think about it again.
→ Think again → rethink
✔ rethink

16. I’m going to ______ the wheel! I know I can make a new and better wheel!
→ Invent again → reinvent
✔ reinvent

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Final Answers:

1. reheat
2. reinjured
3. renew
4. reuse
5. resend
6. re-enter
7. redo
8. reschedule
9. rewrite
10. retold
11. restart
12. rehired
13. readjust
14. redial
15. rethink
16. reinvent

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Explanation:

The prefix "re-" means again or back. So when we add "re-" to a verb, it usually means doing the action once more or again. For example:
- reheat = heat again
- redo = do again
- resend = send again

We matched each sentence contextually to find the most logical verb with "re-", and used appropriate tenses (past, present, future) based on the sentence structure.

✔ All answers are grammatically correct and fit the context perfectly.