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八年级英语Past and present教案 unit 1 past and present一. 教学内容:unit 1 past and present grammar 二. 教学目标:掌握unit1的语法: present perfect tense 现在完成时的用法 (一)基本概念1、定义现在完成时用来表示之前已发生或完成的动作或状态,但它的影响现在还存在;也可表示持续到现在的动作或状态。2、构成: have (has) +过去分词。规则变化的过去分词与过去式的变化一样,在动词词尾加ed; 不规则变化的过去分词见不规则动词表,需要同学们记忆。3、句型:现以see the film为例将现在完成时的肯定句,否定句和疑问句列表如下:肯定句:i/you/we/they have seen the film. he/she /it has seen the film.否定句:i/you/we/they have not/ havent seen the film.he/ she/it has not/hasnt seen the film.疑问句:have i/you/they seen the film? yes, you/ we/i/they have. no, you/ we/i/they havent. has he/she/it seen the film? yes, he/ she/ it has. no, he/ she/ it hasnt. (二)用法:现在完成时既涉及过去,又联系现在。用法一:表示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。常与just(刚刚),already(已经),never(从来没有),ever(曾经),before(以前),yet(仍然),once(一次),twice(两次),many times(很多次),how many times(多少次),so far(迄今为止),during the past(last)three years(最近三年来)等连用。 副词的位置:just常用于肯定句中,放在have / has后,he has just come .never表示否定, 放在have / has后, he has never visited the great wall.ever用于疑问句中,句型为: have / has主语ever 过去分词?“曾经过吗?”用于询问某人过去的经历。have you ever been to the farm?before用于句末,the woman has never heard of that before.yet 用于句末或not 之后. has the train arrived yet? no, not yet.already用于肯定句, have / has 之后或句末.we have already finished it.so far用于句首或句末. so far, we have visited the moon.用法二:表示过去已经开始,一直延续到现在的动作或状态。时间状语有: (三)现在完成时态中可以和表示一段时间的状语(for,since,how long, all ones life)连用的动词必须是表示延续的情况或动作的动词,即延续性动词。如:be,have,know,live,work,study,learn,teach,keep,speak,talk,draw,wait,wear,walk,sleep,drive,write,do,clean等。i have been a teacher for nearly 20 years. how long has he lived here? (四)延续性动词的现在完成时可和包括“现在”在内的(到说话时仍未结束)表示一段时间的状语连用。如this morning,today,this week,these dayshe has been to beijing three times this year.he has written two letters this morning.(说话时间在上午)he wrote two letters this morning.(说话时间在下午或晚上) (五)英语中还有一些动词的意义决定它们所表示的动作不能延续,只是一瞬间345672019-07-19 unit 1 past and present一. 教学内容:unit 1 past and present grammar 二. 教学目标:掌握unit1的语法: present perfect tense 现在完成时的用法 (一)基本概念1、定义现在完成时用来表示之前已发生或完成的动作或状态,但它的影响现在还存在;也可表示持续到现在的动作或状态。2、构成: have (has) +过去分词。规则变化的过去分词与过去式的变化一样,在动词词尾加ed; 不规则变化的过去分词见不规则动词表,需要同学们记忆。3、句型:现以see the film为例将现在完成时的肯定句,否定句和疑问句列表如下:肯定句:i/you/we/they have seen the film. he/she /it has seen the film.否定句:i/you/we/they have not/ havent seen the film.he/ she/it has not/hasnt seen the film.疑问句:have i/you/they seen the film? yes, you/ we/i/they have. no, you/ we/i/they havent. has he/she/it seen the film? yes, he/ she/ it has. no, he/ she/ it hasnt. (二)用法:现在完成时既涉及过去,又联系现在。用法一:表示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。常与just(刚刚),already(已经),never(从来没有),ever(曾经),before(以前),yet(仍然),once(一次),twice(两次),many times(很多次),how many times(多少次),so far(迄今为止),during the past(last)three years(最近三年来)等连用。 副词的位置:just常用于肯定句中,放在have / has后,he has just come .never表示否定, 放在have / has后, he has never visited the great wall.ever用于疑问句中,句型为: have / has主语ever 过去分词?“曾经过吗?”用于询问某人过去的经历。have you ever been to the farm?before用于句末,the woman has never heard of that before.yet 用于句末或not 之后. has the train arrived yet? no, not yet.already用于肯定句, have / has 之后或句末.we have already finished it.so far用于句首或句末. so far, we have visited the moon.用法二:表示过去已经开始,一直延续到现在的动作或状态。时间状语有: (三)现在完成时态中可以和表示一段时间的状语(for,since,how long, all ones life)连用的动词必须是表示延续的情况或动作的动词,即延续性动词。如:be,have,know,live,work,study,learn,teach,keep,speak,talk,draw,wait,wear,walk,sleep,drive,write,do,clean等。i have been a teacher for nearly 20 years. how long has he lived here? (四)延续性动词的现在完成时可和包括“现在”在内的(到说话时仍未结束)表示一段时间的状语连用。如this morning,today,this week,these dayshe has been to beijing three times this year.he has written two letters this morning.(说话时间在上午)he wrote two letters this morning.(说话时间在下午或晚上) (五)英语中还有一些动词的意义决定它们所表示的动作不能延续,只是一瞬间345672019-07-19 unit 1 past and present一. 教学内容:unit 1 past and present grammar 二. 教学目标:掌握unit1的语法: present perfect tense 现在完成时的用法 (一)基本概念1、定义现在完成时用来表示之前已发生或完成的动作或状态,但它的影响现在还存在;也可表示持续到现在的动作或状态。2、构成: have (has) +过去分词。规则变化的过去分词与过去式的变化一样,在动词词尾加ed; 不规则变化的过去分词见不规则动词表,需要同学们记忆。3、句型:现以see the film为例将现在完成时的肯定句,否定句和疑问句列表如下:肯定句:i/you/we/they have seen the film. he/she /it has seen the film.否定句:i/you/we/they have not/ havent seen the film.he/ she/it has not/hasnt seen the film.疑问句:have i/you/they seen the film? yes, you/ we/i/they have. no, you/ we/i/they havent. has he/she/it seen the film? yes, he/ she/ it has. no, he/ she/ it hasnt. (二)用法:现在完成时既涉及过去,又联系现在。用法一:表示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。常与just(刚刚),already(已经),never(从来没有),ever(曾经),before(以前),yet(仍然),once(一次),twice(两次),many times(很多次),how many times(多少次),so far(迄今为止),during the past(last)three years(最近三年来)等连用。 副词的位置:just常用于肯定句中,放在have / has后,he has just come .never表示否定, 放在have / has后, he has never visited the great wall.ever用于疑问句中,句型为: have / has主语ever 过去分词?“曾经过吗?”用于询问某人过去的经历。have you ever been to the farm?before用于句末,the woman has never heard of that before.yet 用于句末或not 之后. has the train arrived yet? no, not yet.already用于肯定句, have / has 之后或句末.we h
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