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1、一般现在时主要用于下面几情况:1)描述当前时间内经常出现、反复发生的动作或存在的状态。在这种情景中,句子常带有表示频率的时间状语:always, everyday, often, once a week (month , year, etc ), sometimes , seldom , usually 等等,以表不句中 的动作或状态是习惯性的、经常性的。例如:They raise ducks as a sideline o 他们以养鸭为副业。She doesnt often write to her family, only once a month.她不常给家里写信, 仅一月一封而已。I
2、cycle to work every day o我每天骑自彳丁车上班。It seldom rains here 。这儿很少下雨。2故为了描述状态、性质、特征、能力等等。这里的目的是为了,描述现阶段的动作或状态。其重点”不是强调动作发生 的时间、或进行的状态”。例如:He can speak five foreign languages o 他能说五种外语。That is a beautiful city。那是座美丽的城市。Changjiang River is one of the longest rivers in the world.长江是世界上最长 的河流之一。She majors i
3、n music。她主修音乐 oAll my family love football o我全家人都喜欢足球。My sister is always ready to help others 我妹姝总是乐于助入。3)陈述客观事实、客观真理。顾名思义,客观的情况是”没有时间概念”的j也”不会在意动作进行的状态、 例如,The sun rises in the east。日出东方。The earth goes around the sun。地球绕着太阳转。Ten minus two is eight。十减二等于八。Light travels faster than sound。光的速度比声音的速度快
4、。The United States lies by the west coast of the Pacific Ocean.美国位于太平洋 西岸。4)根据英文语法规定.当主句的谓语动词是一般将来时,那么时间或条件 状语从句的谓语动词只能用一般现在时来表示将来要发生的动作。例如:Illtell him the news when he comes back.他回来时,我将告诉他这个消息、。If you take the job , they will talk with you in greater detailso如果你接受这份工作,他们将和你谈谈细节。用于一殷现在时的副词,除了上面提到的一
5、些表示频率的以外,常见的还 有:now, today , nowadays 等等。一般过去时主要是用来描述在过去某个时候发生的动作或存在的状态。它也可以用来 表示在过去某段时间里经常发生的习惯性动作。这一点在表达意义上与一般现 在时相同,只是所在的时间区域不同而已。由于它的主要作用如此,所以在使 用一般过去时的句子里常常有一个意义较具体的过去时间状语。这也是它与现 在完成时的最大区别之一。一殷过去时由谓语动词的过去式表示,也就是说动词词末要加ed(除不规则 动词外)。常和一般过去时连用的过去时间状语有:last night (week,month , year, century , etc )
6、, yesterday, the day before yesterday , yesterday morning ( afternoon , evening ), in 1999 , two hours ago ( one week ago , tree years ago, 痔等。使用一般过去时,在某种意义上说就是要强调动作或状态发生或存在于 过去的某个时候。”过去”的时间概念有两层意思:一是指”现在某个时间似前 的时间二是指,说话、与文章的那个时间点似前的时间,在这个意义上,” 现在的那个时间点”是很小很小的,甚至于小到无法堇化的程度。例如:He got his driving lice
7、nse last month.他上个月拿到了 驾照。-Wheres Jim?吉姆在哪里?-He just went outo 他刚刚出去。一般将来时概念:一般将来时表示将来某个时间要发生的动作或存在的状态,也表 示将来经常发生的动作。、常见的将来时间状语:tomorrow, the dav after tomorrow, this afternoon, this vear. before long, in the future; some day(将来的某一天), next year: next Sunday. soon: in ten days(十天后)等二、一般将来时结构:主语+ will
8、 (shall) +动词原形。动词一般将来时,表示将要发生事 商有人称都可以用will,shaU只用于L We后面)如 I 肯定式:They will finish the work next week. 否定式: They won t finish the work next week. 疑I 可式 x Will they finish the work next week?Yes, they will. / No, they won t. 0主意:不能用 Yes, they 11.) 特殊疑问句:How many books will you give us?I 11 give you t
9、hirty books.2. 主语 + be (am: is, are) going to + 动词原形 。be going to5表打算,准备计划将来干衰可能,有必然,通过现象来判断。 如8 I,m going to see a film this evening.今晚上我打算去看电影。It s going to rain.天要下雨了。We aren t going to have any lessons next week.我们下周不上课o3. will/ shall 和 be going to 结构的区别(1) 对于事先经过考虑的打算、计划,应使用be going to结构。Why ar
10、e you taking down all the pictures? I am going to repaint the wall.(2) 对于事先未经过考虑的打算、计划,而是临时起意,则用will结构。 常见于会话时,乙听了甲的话做出的反应。Where is the telephone book? 1 11 go and get it for you .(3) 表示即将发生某事时,两者区别不大,多可互换。What is going to happen9What will happen?be going to 般指较近的将来,will则表示较远的将来。(4) 正式的通知等多用will.4.
11、其他一般将来时表达结构,(1)少数几个动词如go. come. stan. arrive等,当表示根据规定时间要发生 的动作时,要用一般现在时来表示。My train leaves at 6:30.我乘的火车将在& 30开。 另外,时间、条件状语从句中,“主将从现 r 11 let you know as soon as I hear from him.He 11 go fishing ifit is fine tomorrow. 现在进行时表将来o go, come, leave, arrive, start, stay, remm等表示动 作的动词,可以用现在进彳亍时表将来。V m goi
12、ng to the park with my parents on vacation.be about to +动词原形,表示即将发生的动作。 The concert is about to begin.音乐会即将开始。(4) be+动词不定式,表示安排或计划好的动作。There is lobe a sports meeting next week.语法练习:I. 用适当形式填空1. hbe Wednesday tomorrow.2. Bettywrite to her grandma next wedc.3. you please give him this letter?4.1never
13、do that again.5. She has bought some cloth: shemake herself a dress.6. 一Oh. what a heavy box! I can t lift it.What! Icarry it for you.7.1n China: wherever you(go)3 you(see) ftiendly people.8. Lao Zhao has saved some money and he(buy) a TV set.9. The express from Beijing to Shanghaiat 8:45.II.单选1 We
14、o home until we finish the work.Adon t B won t C will2 Tomsix years old next month. A will be B will is C is going to3 Look at the clouds? Itrain. A is going B will be C is going to4 Wego home until we finish the work.Adon tBwon t C will5 We must take the sick man to hospital. HeA is dying B is goin
15、g to die C will die6 Could you tell methe meeting.A when shall we have B when we would have C when to have7 r 11 talk to him when he.A come B will come C comes D came8 I don t know if ittomorrow.A rains B will rain C is rain D is raining9 Therea school three years ago.A were B use to have C used to be D will be英语语法时态的几种转换英语中的几种时态在一定情况下可以互相转换,以下是几种常见的转换 形式,一、一般过去时与现在完成时的转换在现在完成时中,延续性动词能与表示一段时间的状语连用,瞬间动词 却不能。但是,可用别的表达方式:砌间动词用于“一段时间处g。”的一般过去时的句型中, 瞬间动词可改成与之相对应的延续性动词及短语,与一段时间建用; 瞬间动词用于“It is+段时间+Since+一般过去时”的句型中,表示“自 从以来有时间”的意思,主