Unit 1 Past and PresentGrammar一学习目标1. 初步认识和了解现在完成时的构成和用法。2. 识记动词的过去分词形式。3. 能够在语境中正确运用现在完成时。4. 运用现在完成时谈论发生在过去并与现在有联系的事情。二预习指导：预习任务：1、我们已经学习了动词过去时的变化规则，你能说出有几种变化吗？2、想一想我们已经学习了几种时态？能不能每一种时态各举一个例子。预习检测： 写出下列动词的过去式和过去分词，同时也要熟记。1、teach _ _ 2、bring _ _ 3、get _ _4、know _ _ 5、grow_ _ 6、find_ _ 7、hold _ _ 8、show_ _ 9、keep_ _10、leave_ _ 11、lose_ _ 12、run_ _13、swim_ _14drive_ _ 15、begin_ _三.课内探究：现在完成时的“完成用法”和“未完成用法”一） 现在完成时的结构： have / has + 动词的过去分词 其中 have / has 为助动词,它的否定和疑问句形式全部由 have / has 进行变化。例如: 1. He has finished his homework.他已经做完了家庭作业。否定句：_ 一般疑问句：_?2. His father has been to Beijing three times. 他父亲去过北京三次了。否定句：_. 一般疑问句：_?对划线部分提问_?二）1.现在完成时的完成用法 A、定义：现在完成时的完成用法指的是动作发生在过去某一时刻并已结束，但该动作对现在产生了影响，与现在情况具有因果关系。例如：He has turned off the light. 他已把灯关了。( 动作结束于过去，但说明的是现在的情况：灯现在不亮了。)B、特点：现在完成时完成用法的特点是动作不延续，因此，该时态只能与表示不定的过去时间状语(如：already，yet，before，recently等)、频度时间状语(如：never，ever，once等)、包括现在时刻在内的时间状语(如：this morning month year.，today等)连用。例如： Have you found your pen yet？ 你已找到你的钢笔了吗？用所给动词的适当形式填空（题目有点多但特别重要请认真做哦）1. I_ already _ (see) the film. I _ (see) it last week. 2. - _ he _(finish) his work today ? -Not yet . 3. -_you _(be) to Hong Kong ? -Yes, I _ (be) there twice . 4. -_ you ever _(eat ) chocolate? -No, never. 5. My father _ just _ (come) back from work. He is tired now. 6. Where Li Ming? He _ (go) to the teachers office. 7. Shanghai _ (be) a small town hundreds of years ago. Now it _ (become) a large city. 8. So far (到目前为止) I _(make) quite a few friends here. 9. - I _ (see) the film “Chicken Run”. - Where and when _ you _ (see) it? - Last week. 10. Mary _ already _ (have) her supper. 11. I _ (not want) to see the film. I _ (see) it with my parents. We _ (see) it last Sunday. 12. -_ Uncle Wang _ (mend) the TV yet? -Yes, he_. -When _ he _ it? - Yesterday. 13. _ you _ (read) todays newspaper yet? 14 They _ already_(do) their homework.15. -_ you _ (see) the film last night? -No, I _ (see) it for several times.四达标检测句型转换(每空一词)。1.I have been to Macau before.(改为否定句) I _ _ been to Macau before.2.He hasnt come to school because hes ill (就划线部分提问)_ _ he come to school?3.He has learned English for 5 years.(就划线部分提问) _ _ _ _ learned English ?4.I bought a new bike just now.(用just改写) I _ just _ a new bike.5.We began to learn English three years ago.(改为同义句)We _ _English _three years.6. He has lived here since 1999.(就划线部分提问) _ _ _ he_ here? 7. Mr. Li began to teach English in this school in 1999.（同义句） Mr. Li _ _ English in this school since 1999. 8.They have cleaned the room twice this week. (就划线部分提问) _ _ _ _ they _ the classroom this week? 五收获与反思