Verified answer

Answer:

1. had seen a ghost

2. had heard a noise

3. had cooked dinner already

4. had forgotten the email address

5. had planted

6. had written

7. had practiced

8. had ordered

9. had knocked over the flowerpots

10. had slipped on a banana skin

Explanation:

If past perfect, use "had" + the past participle form of the verb. It would really help you if you familiarize yourself with the past participle form of verbs especially those that have different spellings. Take note, there are verbs that have the same past and past participle.

Examples of past tense and past participle:

• took- taken, wrote-written, ate-eaten, saw-seen, knew-known
• listened-listened, passed-passed, studied-studied, tried-tried

1. had seen

2. had heard

3. had cooked

4. had forgotten

5. had planted

6. had written

7. had practiced

8. had ordered

9. had knocked

10. had slipped

Explanation:

I don’t know if this is correct, hehe.