1、unit 8 现在完成时教案 Teaching objects 1、现在完成时的概念、基本结构、信号词； 2、动词过去分词变化规则； 3、现在完成时与一般过去时的区别 Key points： 1 现在完成时的概念、基本结构、信号词； 2 for 和 since 用法区别； Difficulties： 1、for 和 since 用法区别； 2、延续性动词和非延续性动词用法区别； Teaching Process： Step 1: Warm- up & Lead in T: Good morning, everyone. S: Good morning T：We have said the pr
2、esent perfect tense, now, this class we will summarize the function of present perfect tense. Step 2: Presentation T：现在完成时的结构是怎样的呢？ Ss: T: 肯定句：主语+have/has + V 过分+其他否定句怎么变呢？ T: 否定句： 主语+have/has not +V 过分 +其他 一般疑问句：Have/has + 主语+ V 过分 + 其他 Yes,主语+have/has. No, 主语+ have/has not. (look at the screen,the
3、 example of this structure) T: 动词过去分词变化规则： （同动词过去式变化规则：直、去、双、改+不规） talk -like - study -stop - read-keep- have-be- leave-make- go-meet- come-write- tell-buy- find-build- T: 现在完成时的信号词： Already, yet, ever, just, never 等； for+时间段 Since+时间点或句子 例句： Mr. Brown has had his TV _ 15 years. Ive taken driving le
4、ssons _ last month. My sister has had her cell phone _ a month . My friends havent visited me _ my birthday. We havent used our car _ a long time . She hasnt had a good cup of coffee _years. Tom has worn glasses _ he was 7 years old. T:现在完成时的用法 1)过去发生或已经完成的某一动作对现在造成的影响或结果 例子： Someone has broken the
5、door. (窗户现在是坏的) I have already lost the key. (我现在没有钥匙) 2)现在完成时表示从过去一直持续到现在的动作或状态。 例子：She has learned English for 5 years. He has lived in Beijing since ( 自从)he was born . Step 3 : Compare T：一般过去时与现在完成时有什么区别？ 1）一般过去时表示过去某时发生的动作或单纯叙述过去的事情，强调动作，和 现在不发生关系。 而现在完成时表示过去发生的某一动作对现在造成的影响或结 果，强调的是现在的情况。 2）一般过去
6、时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语 连用，或无时间状语。 例句：I saw this film yesterday.（只说明动作发生在过去。 ） I have seen this film.（强调对现在的影响，电影的内容已经知道了。 ） She has returned from Paris.（她已从巴黎回来了。 ） She returned yesterday.（她是昨天回来的。 ） He has been in the League for three years. (在团内的状态可延续) He joined the League three years ago.(
7、 三年前入团，joined 为短暂行为。) Step 4: Consolidation 复习并总结： 1、现在完成时的概念、基本结构、信号词； 2、动词过去分词变化规则； 3、 for 和 since 用法区别； 4、现在完成时与一般过去时的区别 Step 5: Homework 1.To finish the exercises in the exercise book. 2.To remember the irregular past participle of some verbs. Reflection After this class, the students should kno
8、w the structure and the function of present perfect tense. Beside ,the important part in this tense is the irregular verbs.Students should repeat this part. But in this class, because of the different English level of students, some students can not understand what we have said. However, most of students can master this tense. It is one of the most important tense in junior high school study. For this class, I thought I should give more specific information of the present perfect tense to students and pay more attention to the examples.
