Practice using "don't" and "doesn't" in sentences with this fun grammar worksheet.

This is a grammar exercise focusing on the correct use of “don’t” and “doesn’t” — the negative forms of the verb “do” in the present simple tense.

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📌 Key Rule:

- Use “don’t” with:
- I, you, we, they

- Use “doesn’t” with:
- He, she, it

*(Note: “doesn’t” is used with singular third-person subjects.)*

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✔ Let’s solve each sentence:

1. I ________ swim well.
→ Subject = I → use don’t
✔ I don’t swim well.

2. You ________ speak English.
→ Subject = You → use don’t
✔ You don’t speak English.

3. He ________ write poems.
→ Subject = He → use doesn’t
✔ He doesn’t write poems.

4. She ________ teach Math.
→ Subject = She → use doesn’t
✔ She doesn’t teach Math.

5. It ________ live in Australia.
→ Subject = It → use doesn’t
✔ It doesn’t live in Australia.

6. We ________ play the piano.
→ Subject = We → use don’t
✔ We don’t play the piano.

7. They ________ read newspapers.
→ Subject = They → use don’t
✔ They don’t read newspapers.

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🧠 Why this matters:

In present simple tense, when forming negatives (or questions), we use “do/does” + base verb. The form changes based on the subject:

- I/you/we/they → do not / don’t
- He/she/it → does not / doesn’t

The main verb stays in its base form (e.g., swim, speak, write) — no “-s” added after “doesn’t”!

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✔ Final Answers:

1. don’t
2. don’t
3. doesn’t
4. doesn’t
5. doesn’t
6. don’t
7. don’t

You can now confidently match each subject to the correct negative auxiliary verb! 😊