19 Free Printable Prefix Worksheets 4th Grade - Free PDF at ... - Free Printable

Let's solve this Prefix and Suffix worksheet step by step. The goal is to choose the correct prefix to complete each word in the sentence.

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🔤 Understanding Prefixes:

A prefix is a letter or group of letters added to the beginning of a word to change its meaning. Common prefixes include:
- pre- = before
- re- = again
- dis- = not, opposite
- mis- = wrong
- un- = not
- over- = too much
- under- = less than
- re- = again
- pro- = forward, in favor of
- non- = not
- post- = after

We’ll use context clues from the sentences to determine the correct prefix.

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✔ Let’s go through each question:

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1. Mom had to _____heat the oven to 350° to bake the cake.

- "Heat" is the base word.
- To heat something before baking → we need pre-
- Preheat means to heat in advance.
- ✔ Answer: pre

> ✔️ *preheat*

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2. To help keep the Earth clean, we cycle all of our plastic.

- This sentence is already complete — no blank!
- But wait — it says “we cycle all of or plastic.” That seems like a typo.
- Likely meant to be: “we recycle all of our plastic.”
- So the missing prefix is re-, making recycle.
- ✔ Answer: re

> ✔️ *recycle* (so the blank should be re)

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3. I looked over my writing and found a ______ spelled word.

- “Spelled” is the base word.
- A word that is not correctly spelled → mis-
- Misspelled means incorrectly spelled.
- ✔ Answer: mis

> ✔️ *misspelled*

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4. Before you take off your shoes, you need to _____ tie them.

- You need to tie them before taking them off → before = pre-
- Pretie? Not a word. Wait — maybe it's untie?
- But the word given is “tie”, so perhaps it's untie?
- But the blank is before “tie” — so we’re looking for a prefix.
- Actually, “untie” uses the prefix un-, meaning “not tied” or “to loosen.”
- But the sentence says: “you need to _____ tie them” — meaning loosen the laces before removing.
- So: un- makes sense.
- ✔ Answer: un

> ✔️ *untie*

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5. You may be correct, but I _____ agree with you.

- We're expressing disagreement.
- So the correct prefix is dis-
- Disagree = not agree.
- ✔ Answer: dis

> ✔️ *disagree*

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6. We checked the ______ cast before we planned the event.

- “Cast” → likely forecast.
- Forecast = prediction of weather, often done before an event.
- So the prefix is fore- = before.
- ✔ Answer: fore

> ✔️ *forecast*

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7. The big, gray ______ marine plunged down into the water.

- “Marine” → animal in the sea.
- A whale? But the blank is before “marine”.
- Wait — “______ marine” → could be mammal? But that doesn’t fit.
- Or perhaps it's whale? No.
- Wait — maybe it's great white shark? But we need a prefix.
- Hmm — actually, "marine" is the base word.
- But the sentence says “the big, gray ______ marine” — this sounds awkward.
- Wait — maybe it's “the big, gray whale” — but “whale” isn't a prefix.
- Alternatively, perhaps it's “the big, gray (pre)marine**?” — doesn’t make sense.
- Wait — maybe it's “the big, gray (blue) marine**”? Still not right.

Wait — let's look at the sentence again:

> "The big, gray ______ marine plunged down into the water."

This seems like a typo. It might be intended to be:

> "The big, gray whale plunged..." — but that doesn't involve a prefix.

Alternatively, maybe it's supposed to be:

> "The big, gray killer marine..." — still odd.

Wait — another possibility: "The big, gray (sub)marine**?" — but that would be a submarine, not a marine animal.

But “submarine” is a noun — “sub” is a prefix meaning under.

But “submarine” is already a compound word.

Wait — perhaps the sentence is:

> "The big, gray marine animal plunged..."

But again, no prefix.

Wait — maybe the word is "whale" and the blank is for a prefix?

No — unless it's "premarine" — which doesn't exist.

Wait — perhaps it's "the big, gray (sea) marine**"? Doesn't work.

Alternative idea: Maybe the word is "shark" and the blank is for "great" — but that's not a prefix.

Wait — perhaps the intended word is "whale", but the blank is for "gray"? No.

Hold on — maybe the sentence is:

> "The big, gray orca marine..." — but still.

Wait — perhaps it's "the big, gray (blue) whale" — but again, no prefix.

Wait — maybe it's "the big, gray (killer) whale" — still no prefix.

Wait — perhaps the intended answer is "the big, gray (deep) marine"? Doesn't work.

Wait — maybe it's "the big, gray (sub)marine" — but that would be a submarine, not a living creature.

But submarines are man-made.

Wait — perhaps it's a typo and it's supposed to be:

> "The big, gray whale jumped into the water." — but no blank.

Alternatively, maybe the word is "marine", and the blank is for "pre" — but premarine doesn't mean anything.

Wait — perhaps it's "the big, gray (dolphin) marine" — no.

Wait — I think there might be a mistake in the worksheet.

But let's consider: "marine" — if we add "pre", it becomes "premarine" — not a word.

But "pre" is used in "prelude", "preview", etc.

Wait — maybe it's "the big, gray (whale)", and the blank is for "blue"? No.

Wait — perhaps the word is "shark", and the blank is for "great"? Still no.

Wait — maybe the sentence is:

> "The big, gray (great) white shark" — but no prefix.

Wait — perhaps it's "the big, gray (killer) whale" — again, no prefix.

Wait — maybe the intended word is "submarine", and the blank is "sub"?

But the sentence says “______ marine”, not “______ marine”.

Unless it's "submarine", and the blank is "sub" — but then the full word is "submarine", which is two words: sub + marine.

So the blank is "sub".

But “submarine” is a compound word.

So the prefix is "sub-".

And “submarine” means under the sea.

So even though it’s not a living creature, it could be interpreted as a vehicle.

But the sentence says “plunged down into the water” — which could apply to a submarine.

But it says “the big, gray ______ marine” — so likely "submarine".

So the blank is "sub".

✔ Answer: sub

> ✔️ *submarine*

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8. If you want to be ready for something, you need to. ______ pare.

- “Pare” — likely prepare.
- Pre- means before.
- Prepare = get ready in advance.
- ✔ Answer: pre

> ✔️ *prepare*

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9. Make sure you ______ turn the library book on time!

- “Turn” — likely return.
- Re- means again.
- Return = give back.
- ✔ Answer: re

> ✔️ *return*

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10. I try to be careful but sometimes I make a ______ take.

- “Take” — likely mistake.
- Mis- means wrong.
- Mistake = error.
- ✔ Answer: mis

> ✔️ *mistake*

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✔ Final Answers:

| # | Word | Prefix | Completed Word |
|---|-------------|--------|--------------------|
| 1 | heat | pre | preheat |
| 2 | cycle | re | recycle |
| 3 | spelled | mis | misspelled |
| 4 | tie | un | untie |
| 5 | agree | dis | disagree |
| 6 | cast | fore | forecast |
| 7 | marine | sub | submarine |
| 8 | pare | pre | prepare |
| 9 | turn | re | return |
|10 | take | mis | mistake |

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📝 Summary of Answers:

1. pre
2. re
3. mis
4. un
5. dis
6. fore
7. sub
8. pre
9. re
10. mis

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💡 Explanation:

Each answer was determined by:
- Understanding the context of the sentence.
- Knowing the meaning of common prefixes.
- Using logic to find the word that fits both grammatically and semantically.

For example:
- “Preheat” = heat before.
- “Recycle” = cycle again.
- “Misspelled” = spelled wrongly.
- “Untie” = to undo tying.
- “Disagree” = not agree.
- “Forecast” = predict before.
- “Submarine” = under the sea.
- “Prepare” = get ready before.
- “Return” = give back.
- “Mistake” = wrong action.

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✔ All answers are based on common English prefixes and real-word usage.

Let me know if you'd like a printable version or explanation for any specific one!