八年级英语下册Unit6课件人教新目标版.pptVIP

用for和since填空 They have been learning Chinese _____ they came to China. 2. I haven’t seen her _____ a long time. 3. He has been living here _____ 2001. 4. She has been doing her homework ____ two hours. 5. It’s 5 years _____ we left school. 6. – How long has Mary been a teacher? – _____ two years ago. since for since for since Since 7. Marica has been running ____15 minutes. 8. Sarah has been sleeping _____ 9:00. 9. Dale has been talking on the phone _____ 5 minutes. 10. Lucy has been studying Chinese ______ he was 6 years old. for since for since 2 hours How long has she been reading ? She has been reading for 2 hours. She has been reading since 2 hours ago. half an hour How long has he been playing computer games? He has been playing computer games for half an hour. He has been playing computer games since half an hour ago. 15 minutes How long has he been drawing a picture/painting? He has been drawing a picture /painting for 15 minutes. since 15 minutes ago. 45 minutes How long have they been playing soccer? They have been playing soccer for 45 minutes. since 45 minutes ago. an hour How long have they been swimming? They have been swimming for an hour. since an hour ago. 现在完成进行时与现在完成时 现在完成时： I have opened the can. 我打开了罐头。(完成了这一单一的动作) 现在完成进行式： I have been writing the letter since then. 从那时起我一直在写这封信。 (动作从过去一直持续到现在还在继续) 注意: 现在完成进行式表示从过去某时开始到现在 这一段时间里一直还在延续的动作。 现在完成进行时与过去时的比较： 一般过去时: 表示过去发生的事, 常与表示过去的时间 状语连用。需要注意的是, 只要有表示过去的时间, 就 不能用现在完成进行时。因此不能说： e.g.I have been skating at eight o’clock.( ) I have been skating since eight o’clock. (√) Or: I have been skating for two hours. (√) I watched TV for three hours. 我看了三小时的电视。(我现在没有看电视了) I have been watching TV for three hours. 我看了三小时的电视。(我现在仍然在看电视) 现在进行时: 只表示这个动作现在正在进行, 或 现阶段正在进行。 e.g. I am skating now. 相对于现在进行时来说, 现在完成进行时更强调动作 对于现在的影响。例如： I am sitting here right now. I have been sitting here for two hours. 前一例的意思是“我现在正坐在这里”, 暗含的意思 可能是“你不能坐这儿了”; 后一例的意思是“我已经 在这里坐了两个小时了”, 暗含的意思可能