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一、一般过去时与一般现在时定义及结构的区分
1）概念
一般过去时：过去发生的动作或是状态
a.表示过去某个时间里发生的动作或状态；
b.过去习惯性、经常性的动作、行为；
c.过去主语所具备的能力和性格。
一般现在时：现在通常性、规律性、习惯性的动作或是状态 a.表示经常发生的动作，是一般情况不是具体的某一件事； b.长期存在的一种状态；
c.永恒的事实或真理，谚语等。
2)基本构成 并不能
A．谓语动词是实义动词时的结构：
一般过去时：
肯定句：主语+动词过去式+其他
否定句：主语+did+not+动词+其他
疑问句：Did+主语+动词+其他
特殊疑问句：特殊疑问词+did+主语+动词+其他 否定疑问句：Did+主语+not+动词+其他
一般现在时：
肯定句：主语+动词或（动词+s）+其他
否定句：主语+do/does+not+动词+其他
疑问句：Do/Does+主语+动词+其他
特殊疑问句：特殊疑问词+do/does+主语+动词+其他 否定疑问句：Do/Does+主语+not+动词+其他
注：变化最大的在于:do/does→did(过去式的动词变化)
B.谓语动词是助动词时：
a． Be 动词
一般过去时：
肯定句：主语+was(were)+表语
否定句：主语+was(were)+not+表语
疑问句：Was(Were)+主语+表语
特殊疑问句：特殊疑问词+was(were)+主语+表语 否定疑问句：Was(Were)+主语+not+表语
一般现在时：
肯定句：主语+be动词+表语
否定句：主语+be动词 +not+表语
疑问句：Be动词 +主语+表语
特殊疑问句：特殊疑问词+be动词+主语+表语
否定疑问句：Be动词 +主语+not+表语
注意：am(I)、is（he/she/it）→was
Are(we/you/they)→were
第三人称时，动词要进行变化。
b.have/has
一般过去时：
肯定句：主语+had+表语
否定句：主语+had+not+表语
疑问句：Had +主语+表语Did+主语+have+表语
特殊疑问句：特殊疑问词+did+主语+have/has+表语
否定疑问句：Did +主语+have/has+not+表语
一般现在时：
肯定句：主语+have/has+表语
否定句：主语+have/has +not+表语
疑问句：Do/Does+主语+have/has+表语
特殊疑问句：特殊疑问词+have/has +主语+表语
否定疑问句：Do/Does +主语+not+表语
注意：不管是过去时还是现在时，疑问句都需要助动词did或do.c.情态动词过去式：
一般过去时：将情态动词变成过去式，后面加原形，其他句型转变的规
则与be动词基本一致。
shall―will―can—may―must―
have to―
例：I can swim.肯定句:
否定句：
疑问句：
3)怎样从时间状语上判断一般现在时和一般过去时
一般过去时：
yesterday(morning,afternoon,evening)；the day before yesterday ；
last night(week,Sunday,weekend,month,winter,year,century 世纪）； ago ；this morning/afternoon/evening ；when引导的状语从句（过去时）；
just now ；the other day--a few days ago；
at the age of 10（过去年龄段）；in the old days
一般现在时：
always,usually,regularly,every
morning/night/evening/day/week,often,sometimes,occasionally,from time to time, twice a week, rarely, seldom, once a month, hardly, ever, never
4)一般过去时与一般现在时动词的变化规则：
一般过去时：
A.规则动词过去式的构成有四条规则：
①一般在动词原形末尾直接加上-ed。如：look-looked。
②以不发音的字母e结尾的动词，去e再加-ed。如：live-lived。
③末尾只有一个辅音字母的重读闭音节，先双写这个辅音字母，再加-ed。
如：stop-stopped。
④末尾是辅音字母+y结尾的动词，先变y为i，然后再加-ed。
如：study-studied。
B.不规则动词的过去式需特殊记忆。如：am(is)-was, are-were, go-went,come-came, take-took, have(has)-had等。
注: 课本后面都有不规则动词的变化，需熟记。
一般现在时：
a.一般情况下，加-s;
b.以s, sh, ch, x，o等结尾的词, 加 –es;
c.以辅音字母+y结尾的词, 变y 为i再加es.一、课堂练习
一）、写出下列动词的三单形式和过去式
三单过去式三单过去式三单过去式三单过去式
buy _______ _______fly _____ _______plant ______ _______study ______ _______
drink _____ ______play_____ _______go ______ _______make ______ _______
do _______ ______dance ______ ______worry ______ _______ask _______ _______
taste _____ ______put ________ ________
let ______ ______run _______ _______keep _____ _______have______ ________
find _____ ______get____ring _______ ________
write_____ _______ sleep _______ _______give _____ _______stop______ _______
二）.用正确的动词形式填空
1.The children ___________(run)everyday.2.-I ________ up at half past six this morning.(get)
-My father always __________(come)back from work very late.3.My mother ____________ a lot of fruit yesterday afternoon.(buy)
4.They ________ _________ a meeting yesterday.(not have)
5.-______ you _________(have)any color pens?-Sorry, I don’t have any.6.She likes eggs, but she __________________(not like)bread.7.My mother(tell)me a story every night.8.– How much meat ________ you ___________(want)?-A kilo,please.9.Someone __________(be)in the next room.10.There __________(be)a pen and two erasers in the pencil-box.11.You must _________(get)here at two this afternoon.12.The twins _________ thirteen two years ago.(be)
13.We must __________(help)the teacher carry it.14.Who __________(teach)you English in your school?
15.The teacher is busy.He only __________(sleep)five hours a day.16.Near our school there _________(be)a shop, it _________(sell)a lot of
books.17..18.What _______ he _________(like)?
19.He __________(teach)English in a middle school.20.Y21.He can ___________(sing)this song.22.Let’s ___________(help)my mother ___________(cook).23.I think Li Lei must ______________(be)at school.24.There __________(be)some bread and meat on the table.25.Liu Ying _______________(study)in Beijing these days.26.Han Meimei often ____________(play)games after school.27.Lily __________(be)a Young Pioneer.三）.句型转换
1.They came to China in 1990.(变一般疑问句)
__________ they ________ to China in 1990?
2.I was ill for two days last week?(同上)
________ you ill for two days last week?
3.The twins go to school on foot every day.(同上)
_________ the twins _______ to school on foot every day?
4.She washed the clothes last Sunday.(变否定句)
She _________ ________ the clothes last Sunday.5.My mother likes her students.(变一般疑问句)
_______________________________________
6.Do you watch TV on Sunday?(用last Sunday 改写成过去时态的句子)______________________________________________
7.Wei Hua bought a new pen yesterday.(变否定句)
She ________ ________ a new pen yesterday.8.We had a meeting the day before yesterday.(变一般疑问句)
_______ you _______ a meeting the day before yesterday?________ ________ the twins _______ a good time?
10.There were some cars in front of the house just now.否定句：There _______ ________ cars in front of the house just now.一般疑问句：______ there _____ cars in front of the house just now? 否定句：He ________ _______ to the zoo with his father yesterday.一般疑问句：______ he ______ to the zoo with his father yesterday? 特殊疑问句：heyesterday?否定句：Mary usually _______ ________ games with her grandparents.一般疑问句：______ Mary usually ________ games with her grandparents? 特殊疑问句：Mary usually?
13.Mary does her homework well.否定句：Maryher homework well.一般疑问句：Maryher homework well?
二、作业布置
一）填空They____(be)on the farm a moment ago.There____(be)a shop not long ago.Jenny____(not go)to bed until 11:00 o'clock last night.Danny _____(read)English five minutes ago.I _____(see)Li Lei ____(go)out just now.He ____(do)his homework every day.But he __(not do)it yesterday.7 When I was young, I _____(play)games with my friends.When ____you_____(write)this book? I _____it last year.Did he____(have)lunch at home?
11.There __________(be)some bread and meat on the table.13.Liu Ying _______________(study)in Beijing these days.14.They _____________________(clean)the floor now.15.Han Meimei often ____________(play)games after school.二）改错
1.Does he enjoys listening to music?
2.Mary’s mother was ill yesterday.She has to stay at home to look after her.3.My teacher was angry because I am late.4.The boy has a party at home now.5.I were went to the library with my friends two hours ago.6.He spends much time reading book last weekend.7.Linda can helps his mother clean the room.8.I buyed a large bag of milk in the supermarket.9.Someone are looking at you.10.I am go fishing now.
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