初中8种基本时态讲解

1、 / 11英语时态 8 种基本时态讲解一概念：英语中表示不同时间发生的动作或存在的状态，需用不同的动词形式表示，这种不同的动词形式称为时态。二种类： （基本时态）一般现在时一般过去时现在进行时过去进行时一般将来时过去将来时现在完成时过去完成时三用法：1 一般现在时：1 ）一般现在时表示经常发生或习惯性的动作或状态与客观现实和普遍真理。一般现在时常以动词原形表示， 但当主语是第三人称单数时， 动词词尾力口-s或-es。2）句型结构：主语+V .（包括be动词）+宾语+She is an engineer.He has breakfast at 6:00every day.3 ）注意：a） 一般现

2、在时通常与always , often , usually , every daysometimes , once a week 等时间状语连用。I always watch TV at 8:00 in the evening .They go home once a week .We usually do our homework at home .表客观现实或普遍真理。The sun always rises in the east .The light travels faster than the sound .表永远性的动作或状态。He lives in the country .4

3、)第三人称单数变化形式。一般情况动词在词尾加 -s .eesspeakspeaksworkworkslivelives以 o, s, x, ch, sh 结尾的单词在词后加 -es.dodoesgogoesfinishfinishesbrushbrushesfixfixespasspasseswatchwatchesc)以“辅音字母+ y”结尾的单词变y为i加-es.Studystudiescarry-carriescrycriesd) 以“元音字母 y ”结尾的单词直接加 -s.playplaysstaystays例句：我们每天晚上九点做作业。我在早上七点半起床。他每天七点去上班。我们经常下

4、午打篮球。他喜欢音乐。地球围绕太阳转。火车六点出发。5 )否定句和疑问句。He is an engineer.He isn t an engineer.Is he an engineer?Yes, he is ./ No, he isn t.We get up at 7:30 in the morning .We don t get up at 7:30 in the morning .Do you get up at 7:30 in the morning ?Yes, we do. / No, we don t.He likes music.He doesn t like music.Doe

5、s he like music?Yes ,he does./ No, he doesn t .2 一般过去时1 )一般过去时表示发生在过去的动作或存在的状态，通常与表示过去的时间状语yesterday, last night ,some years ago, in 1990,inthose days. 等连用。I was a student 6years ago.I went to Beijing last year.They saw a film last night .2）句型结构：主语+V .过去时+宾语+例句：昨天他很忙。去年他抽烟了。两年前他去参军了。他在 1990 年去世了。3 ）

6、否定句和疑问句。He was busy yesterday.He wasn t busy.Was he busy?Yes, he was./ No, he wasn t.He smoked last year.He didn t smoke last year.Did he smoke last year?Yes ,he did ./No ,he didn t.He joined the army in 1990.He didn t joined the army in 1990.Did he join the army in 1990?Yes ,he did ./No ,he didn t.

7、4）动词过去式变化规则。a）一般情况下的词加-ed.workworkedcall called laugh laughedExplainexplained finishfinished knockknocked b）以不发音的字母e结尾的单词直接加-d .livelived changechanged smokesmokeddiediedgraduategraduated drivedrove c）以“辅音字母+ y”结尾的单词，变y为i加-ed.studystudied carrycarried crycriedtrytried marrymarried d）以“元音字母+ y”结尾的单词直

8、接加-ed.playplayed staystayed e） 以“一个元音字母一个辅音字母” 结尾的单词应先双写这个辅音字母然后再加 -ed.stopstopped planplanned patpatted f） 动词不规则变化：dodid gowent ecame runran writewrotebeginbegan drinkdrank keepkept leaveleft sleepsleptmakemade lielay digdug eatateknowknewcutcut setset letlet readread hurthurt例句：我前天拿走了这本书。去年我买了一辆自行

9、车。每天晚上我听音乐。她通常待在家里。两天前我完成了这项工作。复习：I (be) a teacher 2 years ago.He (be) a student now.He (do) his homework at home every day.They (join) the Party in 1998.We (not eat) apples yesterday.We(not play) basketball every day.He(not go ) home once a week.I am 16 years old. ( 划线部分提问 )I go to work at 8:00 eve

10、ry morning. ( 划线部分提问 )They joined the Party in 1990. ( 划线部分提问 )I went to Beijing last year. ( 划线部分提问 )3 一般将来时1) 表示将来发生的动作或存在的状态，常与表将来的时间状语tomorrow, the day after tomorrow, next Sunday, soon, in afew days 等连用。2)句型结构：主语+ will/shall +V.原形+(第一人称用shall )I shall go to Shanghai tomorrow.They will have a me

11、eting next week.She will be 20 years old.Will she be 20 years old?Yes, she will./ No, she won t .3)主语 + will/shall + V.原形 + be(am, is, are)going toThey will have a meeting next Sunday.(will=are going to )What will they do next Sunday ?When will they have a meeting?be about to V. 原形I am about to leav

12、e school.不能与表示时间的副词连用。They are about to set out.( V)They are about to set out soon.( x )复习题：.He (do) his homework at school every day.They (finish) their work yesterday.We (visit) their farm next year. 我半小时后要吃午饭。. 他将骑自行车去学校。. 他们下周日将去买汽车。4 过去将来时) 过去将来时是立足于过去某时， 从过去的观点看将要发生的动作或状态。主要用于宾语从句中。)基本结构：主语+wo

13、uld/should was/were going to +V. 原形+He said that he would have a meeting next week.(He says that he will nave a meeting next week.)They said we should leave school tomorrow.(They say we shall leave school tomorrow.)5 现在进行时1) 现在进行时表示现在或现在这段时间正在进行的动作。 通常与 now,at present 等时间状语连用。2)基本结构：主语 +be(am, is, a

14、re)+ v-ing +You are listening to me carefully now.She is writing a letter this year.Look! They are dancing.We are studying English at present .It s raining hard now.)动词现在分词的构成一般动词直接在词后加 -ingdodoing read - readingwork working think thinkingstudy - studying go - goingwatch - watching jump - jumping以不发

15、音的字母e结尾的动词，应先去掉e然后加-inglike - liking take - takingleave - leaving live - livingreceive - receiving dance - dancinge - ing smoke - smokingwrite - writing以“一个元音字母+ 一个辅音字母”结尾的动词，应先双写这个辅音字母然后再加 -ingstop - stopping begin - beginningdig digging swim swimmingrun running sit sitting(注意：listen listening open

16、 opening eat eatingrain - raining sleep - sleeping)6 过去进行时1 ) 表示过去某一时刻或某阶段时间正在进行的动作， 通常与 at6:00 yesterday, at this/ that time yesterday, when 引导的时间状语等连用。基本结构 主语 +be (was/were) +v- ing +It was raining at 7:00 the day before yesterday.They were building a reservoir at this time last winter.We were rea

17、ding when the teacher came in.We weren t reading Were you reading What were you doing when the teacher came in.例句 1. 前天那个时候Tom 正在看电影。上周日四点我们正在游泳。师看见我们时我们正在玩扑克。I (do) my homework yesterday.He (do) his homework at 5:00 yesterday.He (do) his homework now.现在完成时)1. 表示过去发生的动作对现在造成的影响表示过去某时间已经开始一直持续到现在的动作或状态通常与下列时间状语连用 up to now, in the past, recently,by ,for 5 years, since 1994, so far, already, y