Worksheet for identifying complete and incomplete sentences.

Let's go through each sentence one by one and determine whether it is complete or incomplete. A complete sentence must have:

- A subject (who or what the sentence is about),
- A predicate (what the subject is doing or being),
- And express a complete thought.

An incomplete sentence may be missing one of these elements or may not make a complete thought.

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1. Joe went.

- Subject: Joe
- Predicate: went
- Complete thought? Yes — it tells us that Joe performed an action.
✔ Complete

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2. I saw the kid playing at the park.

- Subject: I
- Predicate: saw
- Object: the kid playing at the park
- Complete thought? Yes — it expresses a full idea.
✔ Complete

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3. Doing your best is.

- This starts with a gerund ("Doing your best") but then says "is" without a complement.
- It’s missing something after "is" to complete the thought.
- For example, “Doing your best is important” would be complete.
✘ Incomplete

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4. When you answer the.

- This is a dependent clause starting with "When."
- It has no main clause and ends mid-thought (“the” is incomplete).
- Missing object or verb.
✘ Incomplete

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5. Please answer all of the questions.

- Subject: (implied "you")
- Verb: answer
- Object: all of the questions
- Complete thought? Yes — it gives a clear instruction.
✔ Complete

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6. It starts at.

- Subject: It
- Verb: starts
- But “at” is a preposition needing an object (e.g., “at 8 PM”).
- The sentence is cut off.
✘ Incomplete

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7. When I grow up I.

- Starts with a dependent clause: “When I grow up”
- Then “I” is incomplete — needs a verb or action.
- Example: “When I grow up, I will be a doctor.”
✘ Incomplete

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8. Not knowing is.

- Similar to #3 — “Not knowing” is a noun phrase, “is” lacks a complement.
- Needs something like “not knowing is dangerous.”
✘ Incomplete

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9. The tree looks.

- Subject: The tree
- Verb: looks
- But “looks” requires an object (e.g., “looks tall” or “looks healthy”).
- No complement provided.
✘ Incomplete

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10. Why is that so important to her?

- This is a question.
- It has a subject ("that"), verb ("is"), and asks a complete question.
- Even though it’s a question, it expresses a complete thought.
✔ Complete

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Final Answers:

| Sentence | Complete/Incomplete |
|--------|---------------------|
| 1. Joe went. | ✔ Complete |
| 2. I saw the kid playing at the park. | ✔ Complete |
| 3. Doing your best is. | ✘ Incomplete |
| 4. When you answer the. | ✘ Incomplete |
| 5. Please answer all of the questions. | ✔ Complete |
| 6. It starts at. | ✘ Incomplete |
| 7. When I grow up I. | ✘ Incomplete |
| 8. Not knowing is. | ✘ Incomplete |
| 9. The tree looks. | ✘ Incomplete |
| 10. Why is that so important to her? | ✔ Complete |

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Summary:

- Complete sentences: 1, 2, 5, 10
- Incomplete sentences: 3, 4, 6, 7, 8, 9

Let me know if you'd like corrected versions of the incomplete ones!