过去进行时和现在完成进行时(2012-2013-1第3课BB).ppt

Past continuous and present perfect continuous For you to judge: Past continuous and past simple Difference between Past continuous and past simple Past continuous and past simple Past continuous and past simple Present perfect continuous and present perfect Difference between present continuous and present perfect things started in the past, and have been in progress until now. It may stop or may continue to go on how long things started in the past , but it focuses on the effect that may have achieved how many times Compare compare Present perfect continuous Present perfect continuous summary Information that is treated as part of the background will tend to be expressed in the past tense. Information that is of current concern, in the foreground, will be expressed in the present tense. Background scene-setting, particularly in stories, is often expressed in the past progressive, and ongoing current situation are described in the present progressive. Viewing recent changes from the current situation is typically expressed by perfect aspect. The dominant contrast, however, is between background and foreground information. Once, more than once, or all the time? 1. He suddenly jumped into the water. 2. Hae-Young understands Korean. 3. She is kicking the car tire right now. 4. My sister hates fish. 5. Someone’s coughing. 6. Something broke the window. 7. Bucky dropped the ball. 8. Soo Yang has a car. Exercise Look at the way the past progressive and the simple past are used in the following. 1. Find a sentence with only one verb in the simple past. Write it on the line below. ____________________________ 2. Find a sentence with one simple past verb and one past progressive. Write it on the line below. _____________________________ 3. Look at the way the past progressive and the simple past are used. Can you tell a difference in meaning? Kewin: I was walking one night. It was bitterly cold, around Christmas 1978, and I was walking. I think I was w