Complete the sentences below using the negative form of past perfect. Use the short form.
1. The man was hit by a red car. The driver - (see) him.
2. I saw him because he - (leave) for work.
3. The girl was afraid. She - (fly) on a plane before.
4. Tamsin was happy to see John again. They - (meet) for a long time.
5. He didn't get the job because he - (send) all his papers.
6. The apartment was dirty. They - (clean) it for a long time.
7. The dog was really hungry. Mary - (feed) it since Monday.

1. The man was hit by a red car. The driver hadn't seen him.
To form the negative form of the past perfect, we use "hadn't" followed by the past participle of the verb. In this case, the past participle of "see" is "seen".

2. I saw him because he hadn't left for work.
Again, we use "hadn't" followed by the past participle of the verb. In this case, the past participle of "leave" is "left".

3. The girl was afraid. She hadn't flown on a plane before.
Using "hadn't" followed by the past participle of "fly", which is "flown", forms the negative past perfect.

4. Tamsin was happy to see John again. They hadn't met for a long time.
Using "hadn't" followed by the past participle of "meet", which is "met", forms the negative past perfect.

5. He didn't get the job because he hadn't sent all his papers.
Using "hadn't" followed by the past participle of "send", which is "sent", forms the negative past perfect.

6. The apartment was dirty. They hadn't cleaned it for a long time.
Using "hadn't" followed by the past participle of "clean", which is "cleaned", forms the negative past perfect.

7. The dog was really hungry. Mary hadn't fed it since Monday.
Using "hadn't" followed by the past participle of "feed", which is "fed", forms the negative past perfect.