虚拟语气英语语法知识点汇总范文
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虚拟语气英语语法知识点汇总范文 1
虚拟语气在一些特殊词中的使用或含蓄条件句
1.wish后的宾语从句。
与现在愿望不一致,用主语十过去时,例如:
I wi。hIwere you.
与过去愿望不一致,用主语+had+过去分词,例如:Iwish I had visited the White House whenI was in the States与将来愿望不一致,用主语+would (could)+原形。
2.It's time句型:当lt's tine后用that从句时应该为主i吾+should+动词原形或主语十过去时,例如:It,s time thatyou went to school.或It's time that you should go to schooL
3- If only引起的感叹句相当于“How I wish+宾语从句”。
(l)If only he could come.他要能来就好了。
(2)If only I had known the answer.我要早知道答案就好了。
4.WOuld rather,as if(though)引导的从句也需使用虚拟语气,表示过去的情况用过去完成时,表示现在与将来的情况用过去时,例如:
(l)I'd rather you posted the letter right away.
(2)She loves the children as if they were hers.
5.含蓄虚拟条件句含蓄条件句是指句中没有明显的虚拟条件句,而是利用其他手段来暗示存在虚拟条件。但是这类隐含式虚拟条件句往往都可以转化为if引导的条件句。常用来表示含蓄虚拟条件的手段有:
(1)介词或介词短语。如but for,but that,without,in case of, under more favorable condition等。
(2)连词。如so that, unless, in case, supposing,lest, provided(倘若……),for fear that(唯恐),in orderthat, on condition that, if only(要是……就好了)等。
注意:lest, for fear that和in case引起的从句中谓语动词多用should+动词原形,但也可以不用虚拟语气,而用动词的陈述语气形式。例如:The foreign teacher spokeslowly in case we misunderstood him这位外籍教师说得很慢以免我们误解。
(3)通过上下文及内在含义,句中往往有but,otherwise, unfortunately等类似转折词。
without, but. but for, otherwise引起的短语或句子常暗含着含蓄条件。例如:
①Without you,1 would never know him
②But for your oooperation, we wouldn't have done it
③But that she was afraid, she would have said no. .
④i would be most glad to help you, butI am busy now.
⑤I would have come to the party yesterday, but ljwas working.
⑥I am busy now, otherwise l would do you the favor!
现在完成时
1、 现在完成时的概念:现在完成时表示动作发生在过去,其结果对现在有影响。 例:Tom has gone out (go的动作发生在过去,对现在有影响)
2、 延续性动词可以和表示一段时间的时间状语连用;非延续性动词则不可以。 例:正确说法:The train has been in the station for two hours;
错误说法:The train has stopped in the station for two hours.
(这辆火车进站停了两个小时)
延续性动词 非延期性动词
定义 动作有持续性,可以持续一段时间。如:live(居住)就可live一年两年。 运作在短时间内结束,不能延续。如marry(结婚)就不能marry一年两年。
例词 Listen,play,rain,work Arrive,begin,borrow,finish
3、现在完成时的构成:
(1)have(has)+过去分词:Tom has gone out。
(2)现在完成时的否定和疑问形式:否定形式在have、has后加not;疑问形式将Have、has提前,如Has Tom gone out。
(3)过去分词的概念及其变化形式:
概念:它和现在进行时中的“动词的ing形式”一样,只是英语中表达时态的一种固定形式。
变化形式:大多数动词的过去分词的外形和动词的过去式完全一样。只有那些不规则变化的动词,不运词的过去式不一样。具体参照“不规则动词表”。
虚拟语气英语语法知识点汇总范文 2
一般现在时:
主:We believe him.
被:He is believed by us.
一般过去时:
主:He bought his children some pens.
被:Some pens were bought for his children by him.
一般将来时:
主:Everyone will know the truth soon .
被:The truth will be known by everyone.
现在进行时:
主:Mary is making a doll.
被:A doll is being made by Mary.
过去进行时:
主:They were carrying the hurt player.
被:The hurt player was being carried by them .
现在完成时:
主:He has received the letter.
被:The letter has been received by him.
过去完成时:
主:They had built ten bridges.
被:Ten bridges had been built by them
虚拟语气英语语法知识点汇总范文 3
助动词
1)协助主要动词构成谓语动词的词叫助动词。被协助的动词称作主要动词。助动词自身没有词义,不可单独使用。例如:
He doesn′t like English. 他不喜欢英语。
(doesn′t是助动词,无词义;like是主要动词,有词义)
2) 助动词协助主要动词完成以下功用,可以用来:
a. 表示时态。例如:
He is singing. 他在唱歌。(北京安通学校提供)
He has got married. 他已结婚。
. 表示语态。例如:
He was sent to England. 他被派往英国。
c. 构成疑问句。例如:
Do you like college life? 你喜欢大学生活吗?
Did you study English before you came here? 你来这儿之前学过英语吗?
d. 与否定副词not合用,构成否定句。例如:
I don′t like him. 我不喜欢他。
e. 加强语气。例如:
Do come to the party tomorrow evening. 明天晚上一定来参加晚会。
He did know that. 他的确知道那件事。
3) 最常用的助动词有:be, have, do, shall, will, should, would等。
3 助动词be的用法
1) be +现在分词,构成进行时态。例如:
They are having a meeting. 他们正在开会。
English is becoming more and more important. 英语现在越来越重要。(北京安通学校提供)
2) be + 过去分词,构成被动语态。例如:
The window was broken by Tom.. 窗户是汤姆打碎的。
虚拟语气英语语法知识点汇总范文 4
1、地点状语从句由where,wherever引导。
注意:where与where的区别:Where表特定的地点,而wherever表示非特定的地点。
Wherever=to/at any place where
2、地点状语从句与定语从句的区别
Where引导定语从句时,从句前应有一个表示地点的名词作先行词;而状语从句前则无先行词。
虚拟语气英语语法知识点汇总范文 5
一、不定式做主语:
1、不定式做主语一般表示具体的某次动作。===动名词doing 表示习惯的,经常的动作。
e.g: To finish the building in a month is difficult.
To do such things is foolish.
To see is to believe. (对等)
注: 1). 不定式作主语时,谓语用单数
2). 当主语较长,谓语较短时,常用it做形式主语,而将不定式放到谓语的后面。
it做形式主语,不定式放在谓语动词之后常用于下列结构中:
(1)It is/was +adj.+of sb. to do…
(2) It is +adj.+for sb.+to do…
It is easy / difficult / hard / foolish / unwise / right / wrong / unnecessary
(3) it is +a +名词+ to do...
It is a pity / a pleasure / a pleasant thing / one’s duty / an honor / a shame / a crime / no easy job… to do
It takes (sb.) some time / courage / patience …to do…
It requires courage / patience / hard work… to do…
注意: probable 和 possible 均可作表语,但possible可以用不定式作真实主语, 而probable不能用不定式作真实主语。
It is probable for him to come to the meeting.(错)
It is possible for him to come to the meeting.
It is possible / probable that he will come to the meeting.
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