2017_2018学年八年级英语下册Unit3Onlinetours第4课时课件牛津版.pptx

8B Unit3 Online tours (Grammar1) Leaning aims. 1. To understand some differences between the Simple past tense and the Present perfect tense. 2.To use the Simple past tense and the Present perfect tense. correctly. Guide One (8) There are some differences between the Simple past tense and the Present perfect tense.Work out the rule Daniel went to Beijing two years ago. Daniel bought a new computer last month. Mr Wu visited Canada in 2010 and 2011. Have a match! Who can do it best? Guide Two (10) To learn Grammar A ,then finish the fowolling exercise. 点拨： （1）现在完成时的肯定句 主语（第一、二人称单、 复数） +have 主语（第三人称复数） +have + 过去分词 主语（第三人称单数） +has （2）现在完成时的否定句 句型 主语+have/has+not+过去 分词+ （3）现在完成时的一般疑问句 句型 Have/Has+主语+过去 分词+. Check: ( ) 1. I _in the factory for over one year. A. work B. worked C. have worked D. was working ( ) 2. Youd better wake him up at once. He _ for four hours already. A. has fallen asleep B.has gone to bed C. has been asleep D. has gone to sleep ( ) 3. Did Jack come to our party yesterday? No, he _ A. isnt invited B. wasnt invited C. didnt invite D. hasnt invited ( ) 4. Oh, this is really a big shop. Do you know when it _? A. built B. was built C. has built D. has been built ( ) 5. Tea is _ in the southeast of China. A. made B. grown C. produced D. grew Class Exercise(-) 根据句意和首字母提示，补全下列单词 1. The government has taken actions to r_ the air production 2. A lot of people threw waste into the lake, so the p_of the lake caused the fish to die. 3. I r_ the importance of spoken English. 4. They want to go skiing on the real ice , h_, it is a hot summer. 5. Mr Chen has lived in the l_island for ten years, but he didnt feel unhappy. Class Exercise(二） 用所给单词的适当形式填空 1. They lived in the country when they got _ (marry). 2. We used to_ (swim) every day when we were children. 3. I wont believe you till I _ (see) the thing with my own eyes. 4. Ha