條件狀語從句完整市公開課獲獎(jiǎng)?wù)n件

1、grammarConditional clauses第1頁第1頁條件狀語從句 引導(dǎo)條件狀語從句最慣用連詞是if，常見if條件狀語從句表示在某條件下，某事很也許發(fā)生 If you ask him，he will help you假如你請(qǐng)他幫忙，他會(huì)幫你。 If you fail in the exam，you will let him down假如你考試不及格，你會(huì)讓他失望。 第2頁第2頁假如你作業(yè)做完了就能夠回家了。 If you have finished the homework， you can go home.第3頁第3頁If 從句 （普通現(xiàn)在時(shí)）， 主句 （ 普通現(xiàn)在時(shí) ）表示科學(xué)常

2、識(shí)，闡明， 經(jīng)常性動(dòng)作，傾向 自動(dòng)會(huì)發(fā)生事 1. If water is heated, it turns to steam. 2. If people dont get enough sleep, their thinking ability is reduced .3. If I need a haircut, I usually go to the barbers near where I live.4. People often dont go out on Sundays if it rains.第4頁第4頁2表示未來也許性，能力， 允諾，命令，要求，請(qǐng)求，提議時(shí)，利用“主將從現(xiàn)”原

3、則。1. If I get the job, Ill buy a mobile phone.2. If my homework is difficult, Ill ask Helen to help me.3. If I have time this afternoon, Ill go to the barbers to get a haircut.第5頁第5頁那么，除了if之外，是否尚有其它連詞能夠引導(dǎo)條件狀語從句呢 回答是必定。不但有，尚有諸多。這些詞由于出現(xiàn)頻率小，且使用辦法較復(fù)雜一些，因此不如if為大家所熟知罷了。下面就這些詞使用辦法做一簡(jiǎn)介。 第6頁第6頁1unless 除非；若不；

4、假如不；除非在時(shí)候 1. You will fail to arrive there in time unless you start earlier假如你不早點(diǎn)動(dòng)身，你就不能及時(shí)趕到那兒。 2. Unless bad weather stops me，I go for a walk every morning除非天氣不好，我天天早晨都要去散步。 3. I wont loan you unless you are in extreme need of money若不是你急需用錢，我不會(huì)借錢給你。 第7頁第7頁2on condition that只有在條件下，以為條件 on condition

5、that引導(dǎo)條件從句是主句中事件發(fā)生前提條件或唯一條件。 I can tell you the truth on condition that you promise to keep a secret我能夠告訴你真相，條件是你答應(yīng)保守秘密。 You can pass the custom on condition that we have checked your luggage你能夠通過海關(guān)，但條件是我們得檢查完你行李。 第8頁第8頁3supposing ( that) conj假若，倘若 supposing 引導(dǎo)從句表示一個(gè)假設(shè)條件。通常在句首 Supposing it rains，sha

6、ll we continue the sports meeting？倘若下雨，我們運(yùn)動(dòng)會(huì)還會(huì)繼續(xù)進(jìn)行嗎？ Supposing the stocks of food run out，what shall we do？假若儲(chǔ)備食品都吃光了，我們?cè)趺崔k呢？ 第9頁第9頁4provided that. / providing (that ) conj假若 provided / providing （that）從句表示一個(gè)假設(shè)條件。 He will sign the contract provided (that) we offer more favorable terms假如我們提出更優(yōu)惠條件，他就會(huì)

7、在協(xié)議上簽字。 He wont be against us in the meeting providing (that) we ask for his advice in advance假如我們提前征求一下他意見，他就不在會(huì)上反對(duì)我們。第10頁第10頁5. as ( so ) long as. “只要， 就 ” 表示 一個(gè)前提條件Youll succeed as (so ) long as ( if only ) you try hard.只要你努力，你就會(huì)成功。第11頁第11頁but for +短語， 要不是6.But for the rain，we should have a pleas

8、ant journey要不是下雨，我們旅行必定很愉快。=If it didnt rain, we should have a pleasant journey. But for your help, we should not have finished the task in time要不是你幫忙，我們必定不能及時(shí)完畢任務(wù)。=If you hadnt helped us, we should not have finished the task in time. 第12頁第12頁Without. +短語， 假如沒有.7.Without water, there would be no life on earth at all假如沒有水，地球上就不會(huì)有生命。= If there were no water, there would be no life on earth at all.第13頁第13頁If +虛擬條件句，1. If I were you，I would invite him to the party假如我是你，我會(huì)邀請(qǐng)他參與聚會(huì)。 I would have arrived m