初中英语8大时态课件
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11
动词第三人称单数 形式变化规则
12
规则 一般在词尾加-s,(清辅音后 读/s/,在浊辅音后读/z/; 在t后读/ts/,在d后读/dz/。)
以字母s, x, ch, sh, o结尾的词 加-es,读/iz/,如果动词原形 词尾已有e,则只加-s。
以辅音字母加y结尾的词 ,先变y为i, 再加-es,读/z/
teachers? teachers.
you/ they teacher? 7
肯定式
疑问式
I work. Do I work?
否定式
疑问否定式
I don’t Do I not work?或Don’t I
work.
work?
He/ She /It Does he/ she /it
works.
work?
一般疑问句: ①把be动词放于句首; ②用助动词do提问,如主语为第三 人称单数,则用does,同时,还原 行为动词。
6
源自文库
否定式肯和定疑问式否定式如下表所示疑: 问式
否定式
疑问否定式
I
am
a
teacher.
Am I a
teacher?
I am not./I’mnot a Am I not a teacher?
你昨天徒步旅行玩得开心吗?
10
注意:
在时间状语从句和条件状语从句中用一般现在时表 示将来的动作。 e.g.We won’t go to the park if it rains tomorrow. 如果明天下雨,我们将不去公园。 When I grow up, I will go to America. 我长大后要去美国。
例子
Play→plays leave→leaves swim→swims
pass →passes fix→fixes teach→teaches wish→wishes do→does
study→studies carry→carries fly→flies
13
二、一般过去时
14
概念:过去某个时间里发生的动作或状态; 过去习惯性、经常性的动作、行为。 时间状语:ago, yesterday, the day before yesterday, last week(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc. 基本结构:①be动词;②行为动词
初中语法专题
时态
1
时态的定义: 作谓语的动词用来表示 动作(情况)发生时间 的各种形式。
(不同的时间,用不同的时态。)
2
一般现在时 一般过去时 现在进行时 过去进行时 现在完成时 过去完成时 一般将来时 过去将来时
3
一、一般现在时
4
一、一般现在时:
概念:经常、反复发生的动作或行为及现在的 某种状况。
He/ She/ It
does
Does he/ she/ it not work?
not/doesn’ 或Doesn’t he/ she/ it work?
t work.
We/ You/ Do we/ you/ they They work. work?
We/ You/
They do Do we/ you/ they not work? not/ don’t 或Don’t we/ you/ they work?
表示过去经常发生的动作,也 可用“used to do ”和“would +动词原形”。
17
肯定式
疑问式
否定式
疑问否定式
I
was
a
teacher.
Was I a I was not
teacher? teacher.
a
Was I not a teacher?
9
e.g.Has she any experience in teaching piano lessons?(√) Does she have any experience in teaching piano lessons? (√) 她有教钢琴的经验吗?
Had you a good time going hiking yesterday?(×) Did you have a good time going hiking yesterday?(√)
work.
8
特别提示: have(has)在表示“有”时,否定形式
为haven’t(hasn’t)或have not(has not),变 为疑问句时可直接把have(has)放在句首也 可借助于助动词do(does)。当不表示“有” 的意思时,其否定句和疑问句只能加助动 词do(does)构成。
时间状语: always, usually, often, sometimes, every week (day, year, month…), once a week, on Sunday, etc.
基本结构:①be动词;②行为动词
5
否定形式: ①am/is/are+not; ②谓语动词为行为动词,则在其前 加don't,如主语为第三人称单数,则 用doesn't,加动词原型。
teacher.
He/ She is a Is he/ she a He/ She is not/ Is he/ she not a teacher?
teacher.
teacher? isn’t a teacher.或Isn’t he /she a teacher?
It is Mary.
Is
it
Mary?
It is not /isn’t Mary.
Is it not Mary?/ Isn’t
it Mary?
We/ You/ They
are teachers.
Are we/ you/ We/ You/ They Are we/ you/ they not
they
are not/aren’t teachers?或Aren’t we/
15
否定形式: ①was/were+not; ②在行为动词前加didn't,同时还原 行为动词。
一般疑问句: ①was或were放于句首; ②用助动词do的过去式did 提问,同 时还原行为动词。
16
肯定句: 1、was/were +其他 2、谓语动词使用过去式形式, V-ed分为规则和不规则变化。
动词第三人称单数 形式变化规则
12
规则 一般在词尾加-s,(清辅音后 读/s/,在浊辅音后读/z/; 在t后读/ts/,在d后读/dz/。)
以字母s, x, ch, sh, o结尾的词 加-es,读/iz/,如果动词原形 词尾已有e,则只加-s。
以辅音字母加y结尾的词 ,先变y为i, 再加-es,读/z/
teachers? teachers.
you/ they teacher? 7
肯定式
疑问式
I work. Do I work?
否定式
疑问否定式
I don’t Do I not work?或Don’t I
work.
work?
He/ She /It Does he/ she /it
works.
work?
一般疑问句: ①把be动词放于句首; ②用助动词do提问,如主语为第三 人称单数,则用does,同时,还原 行为动词。
6
源自文库
否定式肯和定疑问式否定式如下表所示疑: 问式
否定式
疑问否定式
I
am
a
teacher.
Am I a
teacher?
I am not./I’mnot a Am I not a teacher?
你昨天徒步旅行玩得开心吗?
10
注意:
在时间状语从句和条件状语从句中用一般现在时表 示将来的动作。 e.g.We won’t go to the park if it rains tomorrow. 如果明天下雨,我们将不去公园。 When I grow up, I will go to America. 我长大后要去美国。
例子
Play→plays leave→leaves swim→swims
pass →passes fix→fixes teach→teaches wish→wishes do→does
study→studies carry→carries fly→flies
13
二、一般过去时
14
概念:过去某个时间里发生的动作或状态; 过去习惯性、经常性的动作、行为。 时间状语:ago, yesterday, the day before yesterday, last week(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc. 基本结构:①be动词;②行为动词
初中语法专题
时态
1
时态的定义: 作谓语的动词用来表示 动作(情况)发生时间 的各种形式。
(不同的时间,用不同的时态。)
2
一般现在时 一般过去时 现在进行时 过去进行时 现在完成时 过去完成时 一般将来时 过去将来时
3
一、一般现在时
4
一、一般现在时:
概念:经常、反复发生的动作或行为及现在的 某种状况。
He/ She/ It
does
Does he/ she/ it not work?
not/doesn’ 或Doesn’t he/ she/ it work?
t work.
We/ You/ Do we/ you/ they They work. work?
We/ You/
They do Do we/ you/ they not work? not/ don’t 或Don’t we/ you/ they work?
表示过去经常发生的动作,也 可用“used to do ”和“would +动词原形”。
17
肯定式
疑问式
否定式
疑问否定式
I
was
a
teacher.
Was I a I was not
teacher? teacher.
a
Was I not a teacher?
9
e.g.Has she any experience in teaching piano lessons?(√) Does she have any experience in teaching piano lessons? (√) 她有教钢琴的经验吗?
Had you a good time going hiking yesterday?(×) Did you have a good time going hiking yesterday?(√)
work.
8
特别提示: have(has)在表示“有”时,否定形式
为haven’t(hasn’t)或have not(has not),变 为疑问句时可直接把have(has)放在句首也 可借助于助动词do(does)。当不表示“有” 的意思时,其否定句和疑问句只能加助动 词do(does)构成。
时间状语: always, usually, often, sometimes, every week (day, year, month…), once a week, on Sunday, etc.
基本结构:①be动词;②行为动词
5
否定形式: ①am/is/are+not; ②谓语动词为行为动词,则在其前 加don't,如主语为第三人称单数,则 用doesn't,加动词原型。
teacher.
He/ She is a Is he/ she a He/ She is not/ Is he/ she not a teacher?
teacher.
teacher? isn’t a teacher.或Isn’t he /she a teacher?
It is Mary.
Is
it
Mary?
It is not /isn’t Mary.
Is it not Mary?/ Isn’t
it Mary?
We/ You/ They
are teachers.
Are we/ you/ We/ You/ They Are we/ you/ they not
they
are not/aren’t teachers?或Aren’t we/
15
否定形式: ①was/were+not; ②在行为动词前加didn't,同时还原 行为动词。
一般疑问句: ①was或were放于句首; ②用助动词do的过去式did 提问,同 时还原行为动词。
16
肯定句: 1、was/were +其他 2、谓语动词使用过去式形式, V-ed分为规则和不规则变化。