高二英语情态动词课件

高二英语情态动词课件内容摘要：

2. He must have known what we wanted. 3. We may have read the same report. 4. He can‟t have slept through all that noise. 5. There‟s someone outsidewho can it be? 6. What can they be doing? 7. These pills might help to cure your disease. 8. You could be right, I suppose. 策划：《学生双语报》 27 策划：《学生双语报》 28 modal verb Grammar ( 33ms ) 策划：《学生双语报》 29 should amp。 ought to Shouldamp。 ought to含义相近，都可表“责任，义务”常可互换。 区别在于， ought to常指特殊情况下的“应当”。 Should则指一般情况。 见下页例句。 Should 可指“竟然”讲 • You ought to help him because he is in trouble now.(语气强，有命令意味。 ) • You should have a rest after finishing your sports.（一般性建议） • You ought to call the police when you find something wrong in your house. • He should take care of the babies tonight. 策划：《学生双语报》 30 ought to 的否定式： He oughtn‟t to do it. ought to 的疑问句： Ought we to do it at once? 反意疑问句里： He ought to be here, oughtn‟t he?或 ought to 表应该， ought to 语气＞ should shouldn‟t he? I „m surprised that he should eat so little every. 策划：《学生双语报》 31 have to • have to 表示 客观需要 去做的事情，意为“必须，不得不。 ” • I have to get the station early to catch the first train. • We missed the bus so we had to walk home. • We have to overe all kinds of difficulties. 策划：《学生双语报》 32 Have to 有多种时态。 常见的有： 一般将来时 ， • We will have to gather at the school gate at 7 tomorrow. • 一般现在时 • I have to take more money with me because my wife has so much to buy. • 一般过去时 • Finally, we had to give up our idea to hold a piic outside as it rained for a whole afternoon. have to （考点） 策划：《学生双语报》 33 shall用于第一，三人称疑问句， 征求意见或请求 shall 第二，三人称 陈述句 ,命令 ,警告 ,允诺 ,威胁 shall , should amp。 ought to 策划：《学生双语报》 34 Need I do …? Yes, you must. No, you needn‟t. dare amp。 need 情态动词 实义动词 dare 否，疑，条 dare not do 否 ,疑 don‟t dare to do don‟t dare do 不用于肯定句 肯： dare to do need 否，疑 needn‟t do (don‟t) need sth (don‟t) need to do 肯： must, have to, ought to, should 策划：《学生双语报》 35 •Must they do…? Yes, they must. No, they needn‟t/don‟t have to. must amp。 have to must have to 主观／客观 主观 客观 时态 现在，将来 多种 表推测 √ 询问意愿 √ 否定意 禁止，不允许 不必 策划：《学生双语报》 36 • must表主观意志，而 have to表由于客观因素不得不做完成的事情。 • Must没有过去式，除在间接引语中可表示过去的时间。 在直接引语中表示过去的时间用had to代替。 • I told her that she must give up smoking. • She said, “We had to get everything ready that night.” 比较 must amp。 have to 策划：《学生双语报》 37 注意对 need问句的回答 : Need I finish the work today? Yes, ________________. No, ________________. No, ________________. you must you needn‟t you don‟t have to 策划：《学生双语报》 38 needn‟t 对其它情态动词的回答 : Shall I tell John about it? No, you __________. Must we do it now? No, you __________. needn‟t (don‟t have to) needn‟t (don‟t have to) 策划：《学生双语报》 39 • Could I borrow your dictionary?(委婉 ) Yes， you can/may. Sure. Go ahead. Please yourself. • May I take this seat?(第一人称疑问句 ) Yes, you may. No, you mustn‟t. 策划：《学生双语报》 40 Practice 1: 高考考题专练 1. I thought you _____like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I ____it. A. might lose B. would have lost C. should have lost。