Past Simple
1. I found my keys.
2. I went to school yesterday.
3. I got a letter.
4. They went to the park yesterday.
5. I washed my teeth.
6. I ate an apple.
7. I got up at 7 o'clock.
Present Perfect
1. We have known each other since 1990.
2. I have lost my keys.
3. I have cut my finger.
4. She has broken her arm.
5. I have done my homework.
6. I have understood it.
7. He has broken his leg.