2019-2020學(xué)年高中英語語法專題24虛擬語氣教案(含解析)

1、學(xué)必求其心得，業(yè)必貴于專精1 二十四、虛擬語氣1概念虛擬語氣：表示動作或狀態(tài)不是客觀存在的事實,而是說話人的主觀愿望、假設(shè)或推測等。如:if i were you，i should study english 。如果我是你，我就學(xué)英語了.may you succeed! 祝您成功！2虛擬語氣在條件從句中的用法條件句有兩類，一類是真實條件句，一類是虛擬條件句. 真實條件句如果假設(shè)的情況是有可能發(fā)生的，就是真實條件句。在這種真實條件句中的謂語用陳述語氣 .如：if it doesnt rain tomorrow，we will go to the park。如果明天不下雨，我們就去公園。學(xué)必求其心

2、得，業(yè)必貴于專精2 虛擬條件句如果假設(shè)的情況是過去或現(xiàn)在都不存在的，或?qū)聿淮罂赡馨l(fā)生的，則是虛擬條件句。如：if he had seen you yesterday,he would have asked you about it。如果他昨天見到你，他會問你這件事的。 （事實上他昨天沒見到你， 因此也未能問你這件事。） 錯綜時間條件句當(dāng)條件狀語從句表示的行為和主句表示的行為所發(fā)生的時間不一致時,被稱為錯綜時間條件句，動詞的形式要根據(jù)它表示的時間作出相應(yīng)的調(diào)整。如：if you had followed my advice just now you would be better now。if

3、 you had studied hard before ，you would be a college student now。 if 省略句在條件句中可以省略if， 把 were,had,should 提到句首，變成倒裝句式 .如:if i were at school again ，i would study harder 。were i at school again,i would study harder。 如果我還有上學(xué)的機會，我會更加努力學(xué)習(xí)。if you had come earlier,you would catch the bus.had you come earlier

4、,you would catch the bus.如果你來得早點，你就能趕上公共汽車。學(xué)必求其心得，業(yè)必貴于專精3 if it should rain tomorrow we sould not go climbing.should it rain tomorros iwe would not go climbing.如果明天下雨的話，我們就不能登山去了 . 用介詞代替條件狀語從句常用的介詞有 with,without，but for。如：what would you do with a million dollars？(=if you had a nillion dollars) 如果你有

5、100萬元，你會做什么？we couldnt have finished the work ahead of time without your help （=if we hadnt got your help) 沒有你的幫助 ,我們不可能提前完成這項工作.without your help we couldnt have finished the work ahead of time。=but for your help,=if it had not been for your help, =had it not been for you help ，沒有你的幫助，我們不可能提前完成這項工作

6、。 含蓄條件句有時在虛擬語氣中并不總是出現(xiàn)if 引導(dǎo)的條件句 ,而是通過其他手段來代替條件句。如：i was ill that day.otherwise ， would have taken part in the sports meeting 。(副詞）he telephoned to inform me of your birthday，or i would have known nothing about it.( 連詞）學(xué)必求其心得，業(yè)必貴于專精4 a man who stopped drinking water would be dead in about seven days 。（定語從句）i might hawe given you nore help ，but i was too busy