Tham khảo tài liệu 'understanding and using english grammar part 51', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | EXERCISE 15. Using verbs of perception. Chart 15-7 part i. Complete the sentences with any appropriate verbs. Both the simple form and the -ing form are possible with little if any difference in meaning. 1. Polly was working in her garden so she didn t hear the phone vihq 2. I like to listen to the birds when I get up early in the morning. 3. The guard observed a suspicious-looking person 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. 5. I was almost asleep last night when I suddenly heard someone on the door. 6. While I was waiting for my plane I watched other planes and part ii. Both the simple form and the -ing form are grammatically correct so you can t make a grammar mistake. But a speaker might choose one over the other. Read the situation then decide which form seems better to you in the sentence that contains a verb of perception. Remember that the -ing form gives the idea that an activity is in progress when it is perceived. 1. SITUATION I was downtown yesterday. I saw the police. They were chasing a thief. When I was downtown yesterday I saw the police gUmsing a thief. 2. 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. 3. situation Uncle Jake is in the bedroom. He is snoring. I know Uncle Jake is in the bedroom because I can hear him. 4. SITUATION When I walked past the park some children were playing softball. When I walked past the park I saw some children __softball. 5. 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. Gerunds and Infinitives Part 2 337 6. SITUATION I glanced out the window. Jack was walking toward the house. I was surprised. I was surprised when
