1. I like to listen to the birds when I get up early in the morning. 2. The guard observed a suspicious-looking person into the bank.
3. There was an earthquake in my hometown last year. It was just a small one, but I could feel the ground
4. I was almost asleep last night when I suddenly heard someone on the door.
5. While I was waiting for my plane, I watched other planes .

Example: Situation: I was downtown yesterday. I saw the police. They were chasing a thief. → When I was downtown yesterday, I saw the police __chasing__ a thief.
1. Situation: The front door slammed. I got up to see if someone had come in.
When I heard the front door , I got up to see if someone had come in.
2. Situation: Uncle Jake is in the bedroom. He is snoring.
I know Uncle Jake is in the bedroom because I hear him
3. Situation: When I walked past the park, some children were playing softball.
When I walked past the park, I saw some children softball.
4. Situation: It was graduation day in the auditorium. When the school principal called my name, I walked to the front of the room.
When I heard the school principal my name, I walked to the front of the auditorium to receive my diploma.
5. Situation: I glanced out the window. Jack was walking toward the house. I was surprised.
I was surprised when I glanced out the window and saw Jack
6. Situation: Someone is calling for help in the distance. I suddenly hear that.
Listen! Do you hear someone for help?
7. Situation: My daughter’s team plays soccer every weekend. I always watch the team when they play a game.
I enjoy watching my daughter soccer every weekend.
8. Situation: I went to bed around eleven. At that time, the people in the next apartment were singing and laughing.
When I went to bed last night around eleven, I could hear the people in the next apartment and . I had trouble getting to sleep because they were making so much noise.
     9. Situation: A fly landed on the table. I swatted it with a rolled up newspaper.
As soon as I saw the fly on the table, I swatted it with a rolled up newspaper.
     10. Situation: I smell smoke. Something must be burning.
Do you smell something ? I do.
      11. Situation: I was sitting in class. Suddenly someone touched my shoulder.
I was startled in class yesterday when I felt someone my shoulder. I didn’t mind. It just surprised me. It was Olga. She wanted to borrow my dictionary.

Using verbs of perception.
Examples:
1- Polly was working in her garden, so she didn't here the phone ring/ringing.
2- I like to listen to the birds sing/singing when I get up early every morning.
3- The guard observed a suspicious-looking person walk/walking into the bank.
4- There was an earthquake in my hometown last year. It was just a small one, but I could feel the ground shake/shaking.
5- I was almost asleep last night when I suddenly heard someone knock/knocking on the door.
6- While I was waiting for my plane, I watched other planes take off/taking off and land/landing.