華閱文章網if引導的虛擬語氣
if從句的虛擬語氣原理： 1、如果句子在想象現在發生而實際未發生的事件，由現在時倒退成過去時： （從句）if+過去時，（主句）4個情態動詞+動詞原形 2、如果句子在想象將來發生而實際不會發生的事件，由將來時倒退成過去時，所以與1是一樣的，但是此處從句有三種： （從句）if+過去時/if+were to do/if+should do，（主句）4個情態動詞+動詞原形 3、如果句子在想象過去發生而實際沒有發生的事件，有過去時倒退成過去完成時： （從句）if+過去完成時，（主句）4個情態動詞+have done 擴展資料發音：英 [?f] ；美 [?f] 釋義 1、conj. （表條件）如果；即使；是否；（表假設）假如 ①（表示條件）如果 ②（表示虛擬）假如，要是 ③（表示讓步）即使 ④是否 ⑤（表示因果關系）每一次。
的時候（總是會） 2、n. 條件；設想 參考資料：百度百科-if。
if虛擬語氣的用法大全高中階段
、 條件句中的虛擬語氣1.條件句中虛擬語氣的形式從句中提出一種與客觀現實不相符或根本不可能存在的條件，主句會產生的一種不可能獲得的結果.條件句中的虛擬語氣根據不同的時間有三種不同的形式.時間從句謂語形式主句謂語形式將來動詞過去式（be用were）should + 動詞原形were to + 動詞原形would / should / might / could + 動詞原形現在動詞過去式（be 用 were）would / should / might / could + 動詞原形過去had +動詞過去分詞would / should / might / could have + 動詞過去分詞2.條件句中的虛擬語氣的舉例（1） 將來時的條件句中的虛擬語氣.如：If he should go to Qing Hua University,he would make full use of his time.如果他要上清華大學的話，他就會充分利用他的時間了.If he were to come here,he would tell us about it.如果他要來的話，他會通知我們一聲.（2） 現在時的條件句中的虛擬語氣.如：If he were free,he would help us.要是他有空的話，它會幫助我們的.If he studied at this school,he would know you well.如果他在這所學校學習的話，它會對你很熟悉.（3） 過去時的條件句中的虛擬語氣.如：If I had seen the film,I would have told you about it.我如果看過這場電影，我會把電影內容告訴你了.If I had got there earlier,I would have met *.如果我早點到那兒，我就會會到了李先生.3.運用條件句中的虛擬語氣時，須注意的幾個問題（1） 當從句的主語為第三人稱單數時，謂語動詞若是系動詞be時，可用 was 代替 were.但在倒裝虛擬結構及 if I were you,as it were 中，只能用 were.如：Were I ten years younger,I would study abroad.要是我還年輕十歲的話，我會去國外學習.If I were you,I would try my best to grasp the chance.要是我是你的話，我要盡力抓住這次機會.（2） 有時，虛擬條件句中，主、從句的動作若不是同時發生時，須區別對待.①從句的動作與過去事實相反，而主句的動作與現在或現在正在發生的事實不符.如：If I had worked hard at school,I would be an engineer,too.如果我在學校學習刻苦的話，我現在也會使工程師了If they had informed us,we would not come here now.如果他們通知過我們的話，我們現在就不會來這里了.②從句的動作與現在事實相反，而主句的動作與過去事實不符.如：If he were free today,we would have sent him to Beijing.如果他今天有空的話，我們會已經派他去北京了.If he knew her,he would have greeted her.要是他認識她的話，他肯定會去問候她了.③從句的動作與過去發生的情況相反，而主句的動作與現在正在發生的情況相反.如：If it had not been raining too much,the crops would be growing much better.如果天不下太多的雨的話，莊家會長得更好.If he had been working hard,he would be working in the office now.要是他工作一直努力的話，他現在已進了辦公室了.（3） 當虛擬條件句的謂語動詞含有 were,should,had 時，if 可省略，而將 were,should,had等詞置于句首.如：Should he agree to go there,we would send him there.要是他答應去的話，我們就派他去.Were she here,she would agree with us.如果她在這兒的話，她會同意我們的.。
【虛擬語氣if大多數的虛擬條件句屬于上面三種情況的一種,但并不排
他的解釋本身就是矛盾的.例句里面主句和從句虛擬的時間很明顯應該不一樣（錯綜時間條件句），if從句中應該用與過去事實相反的虛擬（had done），主句應該用與現在事實相反的虛擬（would/ could/ should/ might + do）.應該說成If you had followed what the doctor said,you would not be so painful now.再舉個例子：If I had taken your advice,I wouldn't be in such trouble *：書是盜版的吧？百分百錯了.。
If引導虛擬句
虛擬語氣是英語中用來表示對不可能發生的事物的一種猜測或假設的語氣。
英語中的虛擬語氣常見的類型有：條件狀語從句中的虛擬語氣，后賓語從句中的虛擬語氣，某些動詞后賓語從句中的虛擬語氣，某些結構后主語從句中的虛擬語氣等。 "if"條件狀語從句中的虛擬語氣的結構如下表：虛擬類型從句主句 對現在情況的假設一般過去時would+動詞原形 對將來情況的假設一般過去時would+動詞原形 對過去情況的假設過去完成時would + have + 過去分詞 一、對現在情況的假設 主要表示對不可能發生或不太可能發生的現在情況的假設，例如：1) If you were an Inuit near the North Pole, you would enjoy the raw meat from seals.2) If you were a man living in the grassland, you would prefer the roasted meat of sheep or goats.3) If you were in Germany, you would find soup that is thick and heavy.4) If you were in China, you would find soup that is thin and clear. 以上各句所體現都是條件狀語從句中的虛擬語氣，表示對不可能發生或不太可能發生的現在情況的假設。
對現在情況假設的虛擬語氣的構成如下： 1）條件狀語從句中用were，而主句中則用would + enjoy 構成2）條件狀語從句中用were，而主句中則用would + prefer 構成3）條件狀語從句中用were，而主句中則用would + find 構成4）條件狀語從句中用were，而主句中則用would + find 構成 二、對將來情況的假設 1) If I had enough time, I would certainly go.2) If you hurried up, you would catch that train.3) If you studied hard in college, you would find a good job in the future.1.如果我有足夠的時間，我一定會去。2.如果你快一點，你還會趕上那趟列車。
3.如果你在大學里努力學習，將來你就會找到一份好工作。 對將來情況的假設的虛擬語氣的構成如下： 1）條件狀語從句中用had，而主句中則用would + go 構成2）條件狀語從句中用hurried，而主句中則用would + catch 構成3）條件狀語從句中用studied，而主句中則用would + find 構成 三、對過去情況的假設 1) If you had begun to do your homework earlier, you would have completed them.2) If I had listened to the teacher, I would have finished reading the English book.3) If Tom had prepared the mid-term exam well, he would have passed it.1）如果你早點開始做家庭作業，你早就做完了。
2）如果我聽了老師的話，我該把這本英語書看完了。3）要是湯姆為其中考試做了充分準備，這次其中考試他就及格了。
對過去情況假設的虛擬語氣的構成如下： 1）條件狀語從句中用had begun，而主句中則用would + have + complete構成2）條件狀語從句中用had listened ，而主句中則用would + have + finished構成3）條件狀語從句中用had prepared，而主句中則用would + have + passed 構成 四、條件句虛擬語氣中的情態動詞該如何選用？ 條件句虛擬語氣中的情態動詞是否只能使用would條件句虛擬語氣主句除了可使用would外還可以便用might, could和should。其中should多用于第一人稱后。
在美國英語中在第一人稱后多用would。1) If I have enough time, I should have finished it. 如果我有足夠的時間，我會完成它的。
2) If he hadn't been ill, he might have come. 要不是生病，他可能就來了。3) If I had been more careful, I could have done better. 我要是細心一點，是可以做得更好的。
五、條件句虛擬語氣從句中的be動詞的正確形式是 條件句虛擬語氣中從句中的be動詞不管是什么人稱，多用were形式。但在非正式特別是口語中，第一、三人稱單數也可以使用was。
1)If he were here now, he would give us a hand. 如果他現在在這兒，他會幫助我的。2)If I were you, I would not go. 如果我是你，我是不會去的。
3)If she was here, we could ask her.如果她在這兒，我們可以問她。六、條件狀語從句中的虛擬語氣的倒裝形式是 當條件句虛擬語氣的從句中含有"be, have, should, could四個詞，從句可以倒裝。
倒裝的形式是把這四個單詞提前至句首，將If省略，剩下的句序不變。1) Were I you, I would study hard. 如果我是你，我就會好好學習。
2)Had I had enough home, I would have done it better.如果我有足夠的時間，我會把這件事做得更好。3) Should John come now, what would you say to him？ 如果約翰現在來，你會對他說些什么？4)Could the dead man have spoken, he would have identified his murderer.如果死人會說話，他會認出誰是謀害他的人。
虛擬語氣,幫幫忙啊,謝謝如何判斷一句句子是省略IF的虛擬條件句
虛擬語氣有三種形式： 1、對現在情況的虛擬：（基本的結構主句would +do,if條件從句用一般過去時） If she knew the call number ,she would call you。
這種結構不能用省略句， 只有當從句中出現系詞were（在虛擬語氣中如果出現系詞只能是were 沒有人稱和數的變化） 才能用省略句，省略if ,were提前，主句不變。 例如： If I were you , I would pass the exam。
Were I you , I would pass the exam 2、對過去情況的虛擬：（基本的結構主句would+have +done，從句用過去完成時） 因為對過去情況的虛擬，從句會用had+done所以這種結構都可以用省略，把had 提前，省略if，其他不變 If she had known the call number, she would have called you Had she known the call number ,she would have called you 3、對將來情況的虛擬，這種虛擬有兩種表達方式： 第一種：主句would +do 從句用一般過去時，這種結構和第一種情況是完全一樣的，所以省略句可以參考上邊所提的第一種情況 第二種：主句would+do， 從句用should+do，例如 If it should rain tomorrow ,the crop would be saved 這種結構都可以用省略句來表示，把if去掉，把should 提前，其他不變 Should it rain tomorrow, the crop would be saved。
if引導虛擬條件句用法
1.（表示條件）如果 ，主句用將來時，if從句用現在時表示將來 He will come if you invite him.如果你請他，他會來的.2.（表示虛擬）假如，要是 1）時態：可以表示過去，現在和將來的情況.它的基本特點是時態退后.a.同現在事實相反的假設.句型 ：條件從句 主句 一般過去時 should( would) +動詞原形 If they were here,they would help you.b.表示于過去事實相反的假設.句型：條件從句 主句 過去完成時 should(would) have+ 過去分詞 If she had worked harder,she would have * rice would not have been burnt if you had been more * my lawyer had been here last Saturday,he would have prevented me from * he had come yesterday,I should / would have told him about it.含義：He did not come yesterday,so I did not tell him about * he had not been ill and missed many classes,he would have made greater progress.含義：He was ill and missed many lessons,so he did not make greater progress.c.表示對將來的假想 句型：條件從句 主句 一般過去時 should+ 動詞原形 were+ 不定式 would + 動詞原形 should+ 動詞原形 If you succeeded,everything would be all * you should succeed,everything would be all * you were to succeed,everything would be all right.3.是否 = whether 連接賓語從句 I wonder if she is ill.。
if虛擬語氣-請問如何區別if引導的條件句和if引導的虛擬語氣
最佳答案 If引導條件句 一半用一般現在時代替將來是 eg: If it rains tomorrow,I'll not go there. if引導的虛擬語氣事態需向前推 if條件句______從句動詞_________主句 對現在虛擬____did,were_________would,could,should+動原 對將來虛擬____should do________would,could,should+動原 ______________were to do ______________were,did（較少，常有時間狀語） 對過去虛擬____had done_________would,could,should+had done 后面對虛擬語氣的總結 豎著看 是歸納好的。
if條件句虛擬語氣有幾種,分別是什么
虛擬語氣在非真實條件狀語從句中的用法及動詞形式
① 表示與現在事實相反的情況
（條件）從句謂語動詞形式 主句謂語動詞形式
謂語動詞用一般過去式
(be用were) should/would/could/might+動詞原形（過去將來時）
eg.
If I were you, I would take an umbrella.如果我是你，我會帶把傘。（事實：我不可能是你）
If I knew his telephone number, I would tell you. 如果我知道他的電話號碼，我就會告訴你。（事實：不知道）
If there were no air or water, there would be no living things on the earth. 如果沒有水和空氣，地球上就不會有生物。（事實：地球上既有空氣也有水）
If I had any money with me, I could lend you some. 如果我帶錢了，我就會借給你些。（事實：沒帶錢）
If he studied harder, he might pass the exam.如果他再努力些，就能通過考試了。（事實：學習不用功）
②表示與過去事實相反的情況
從句謂語動詞形式 主句謂語動詞形式
had+過去分詞（過去完成時） should/would/could/might+
have+過去分詞（現在完成將來時）（過去將來完成時）
eg. If I had got there earlier, I should/could have met her. 如果我早到那兒，我就會見到她。（事實：去晚了）
If he had taken my advice, he would not have made such a mistake. 如果他聽我的勸告的話，就不會犯這樣的錯誤了。（事實：沒有聽我的話）
③表示對將來情況的主觀推測（可能相反或可能性很小）
從句謂語動詞形式 主句謂語動詞形式
If+主語+ ① should+動詞
② did
③were to do
（①通常與一個表示時間狀語連用）其 中were to do可能性最小，
should/would/could/might+動詞原形
* he would come here tomorrow, I should/would talk to him. 如果他哪天來這兒的話，我就跟他談談。（事實：來的可能性很小）
If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪，我們就不能去滑冰了。（事實：不知能否下雪）
If she were to be there next Monday, I would tell her about the matter. 如果她下周一來這兒的話，我就會告訴她這件事得始末。
在表示建議、命令、要求等含義的賓語從句，謂語動詞常用虛擬語氣，"should+動詞原形"構成，should 可省略。
