2019届高考英语总复习(练习):专题2第7讲助动词、情态动词和虚拟语气(含答案) 联系客服

发布时间 : 星期四 文章2019届高考英语总复习(练习):专题2第7讲助动词、情态动词和虚拟语气(含答案)更新完毕开始阅读

第七讲 助动词、情态动词和虚拟语气

助动词

顺口溜巧记助动词

Ⅰ 示之以范 ____________________________________________________原则这样运用

1.(2017·贵州适应性测试)What about Japanese? They dislike the lotus and ____________ not give it as a gift to Japanese because they regard it as the mourning flower.

do 解析:考查时态和主谓一致。结合语境可知,该句陈述的是一般常识,应用一般现在时,且主语为they,故该空用助动词do。

2.(2017·浙江卷)Without hesitation, I decided to follow them and we did had lots of fun that day.____________________

had→have 解析:did加强语气,后跟动词原形。

3.She doesn’t her homework in the morning but in the evening.____________________ doesn’t后加do 解析:doesn’t为一般现在时的否定式后加动词原形。

4.This experience has been shown that traveling by train actually is the safest way of making journeys.____________________

去掉been 解析:show和this experience为主动关系,故去掉助动词been。 5.My father has always go to work by bike since then.____________________ go→gone 解析:由since then可知该句应用完成时,go的过去分词为gone。 Ⅱ 通关点击 ____________________________________________________原则这样解读

1.助动词do/does/did主要帮助构成疑问句、否定句及部分倒装。助动词do/does/did后只能跟动词原形,助动词不能用作实义动词。

2.助动词be/being/been主要帮助构成进行时、完成进行时和各种被动语态。需注意be虽然没有实际意义,但却是结构中不可缺少的。

3.助动词have/has/had主要是帮助构成完成时态和完成进行时态。需注意其构成形式have/has/had done和have/has/had been doing。 [助记]

助动词,用法怪;只当佐料不当菜。 句型变换显身手;常与时态谈恋爱。 have完成be进行,will将来三大块。 加上各自过去式,总共构成六时态。 否定疑问靠它们,过去did,do现在。 一般现在和过去,没有助动也无碍。 第三人单用does,否定疑问照常变。

情态动词

基本含义要知晓

Ⅰ 示之以范 ____________________________________________________原则这样运用

1.(2017·北京卷)Samuel, the tallest boy in our class, ____________ easily reach the books on the top shelf.

can 解析:此处表示“班里最高的男孩塞缪尔可以很容易地够到书架顶部的书”,应填can“能够;可以”。

2.(2015·四川卷)You ____________ be careful with the camera.It costs!

must 解析:考查情态动词的基本用法。句意:你千万要当心这个相机。它价格不菲!从后面It costs!可以推知说话者要求“你”对相机“千万要小心”,此处表示必须,因此要用must。 3.(2016·北京卷)I love the weekend, because I ____________ not get up early on Saturdays and Sundays.

need 解析:句意:我喜欢周末,因为在周六周日我不必早起。根据句意可知填need。

4.(2017·安徽江淮十校联考)As the deadline is drawing near, no one ____________ leave with his own work uncompleted.

shall 解析:句意:因为截止日期即将到来,不完成工作,任何人不许离开。shall用于第三人称陈述句中,表示命令、警告,符合句意。

5.(2015·全国卷Ⅰ)We must found ways to protect our environment.____________________ found→find 解析:情态动词must后接动词原形。

Ⅱ 通关点击 ____________________________________________________原则这样解读 1.情态动词的基本用法

(1)can/could:表示能力、请求、可能性。相关的特殊句型有:can not...too.../enough再怎么……也不过分;can’t help but do不得不做……

The smallest good habits can make a big difference. 最小的好习惯会产生很大的作用。

You can’t be too careful while driving. 你开车时越小心越好。

(2)may/might:表示较小的可能性。相关句型或搭配:may/might as well do表示“还是……好,最好……”。

If you forgot to turn it off when you went away, you might burn down the house. 当你离开时如果忘记关掉它,你可能把整个房子都烧毁的。 Since it is raining hard, you may as well stay here. 既然雨下得这么大,你倒不如待在这儿。

(3)must表示非常肯定的推测;表示与说话人意愿相反或不耐烦等感情色彩,意为“偏要,非要……

不可”;表示“必须”。mustn’t意为“禁止”,表示“不必”应用needn’t。 Men and women must be treated equally in education and employment. 在教育和就业方面,男性和女性必须被平等对待。

He thought that Joe must be dead, but he didn’t want to leave immediately. 他以为乔一定死了,但是他不想立刻就离开。 Must you make so loud noise? 你非得弄出这么大声吗?

(4)shall的用法:①用于第二、三人称的陈述句中,表命令、警告、许诺或威胁等,语气强于should。②用于第一、三人称的疑问句中,表示征询意见,肯定回答应用must,否定回答应用needn’t或don’t have to。

I promised he shall get a present for his birthday. 我许诺给他一件生日礼物。

Shall I tell Brett to come over straight after school tomorrow? 要我告诉布雷特明天放学以后直接过来吗? (5)should/ought to

①表示责任、义务、劝告、建议等,意为“应该”。

(陕西卷)Why shouldn’t we buy the lady a flower?It will make her feel better. 为什么我们不给那位女士买一朵花呢?这会让她感觉好一些。 ②should表示出乎意料的口气,意为“竟然;居然”。

It is quite surprising that he should speak to you like that. 他竟然那样对你说话,真是令人惊讶。

③should和ought to表示推测,指预期的可能性,意为“应该,估计”。 He ought to/should be here on time—he started early enough. 他应该按时到这里了——他很早就出发了。 2.“情态动词+have done”的用法

(1)must have done“一定做过了某事”,表示对过去事情有把握的推测。

(2)could/can have done“本能做某事(而实际上未做)”,can’t/couldn’t have done“(过去)不可能做过某事”。

(3)may/might have done“(过去)有可能做过某事”。 (4)should/ought to have done“本该做某事而没做”。 (5)needn’t have done“本不必做某事(而实际上做了)”。 The boy might have known the truth, but I am not quite sure. 那个男孩(当时)也许知道了真相,但我不是很确定。

(2016·浙江卷)George can’t have gone too far.His coffee is still warm. 乔治一定没走远,他的咖啡仍旧热呢。

虚拟语气

虚拟语气对比记

Ⅰ 示之以范 ____________________________________________________原则这样运用

1.(2015·江苏卷)It might have saved me some trouble if I ____________(know) the schedule. had known 解析:句意:如果我早知道这个计划表,可能会给我省去一些麻烦。根据语境和主句中的might have saved可推知,此处表示对过去情况的虚拟,故if引导的条件状语从句中谓语动词用had done结构,故填had known。

2.(2016·北京卷)Why didn’t you tell me about your trouble last week?If you ____________(tell) me,I could have helped.

had told 解析:根据句意和相关信息判断,条件句表示与过去事实相反的假设,此时从句用过去完成时,主句谓语用“情态动词+have done”形式。

3.(2016·浙江卷)____________(have) the governments and scientists not worked together, AIDS-related deaths would not have fallen since their highest in 2005.

Had 解析:这是一个省略了从属连词if的虚拟语气句,使用了倒装句式。根据主句的would not have fallen可知,这里是表示对过去的虚拟,故填Had。

4.(2015·四川卷)If you are me, would you talk to them?____________________ are→were 解析:根据句意可知,此处为虚拟语气,与现在事实相反,be动词应用were。 Ⅱ 通关点击 ____________________________________________________原则这样解读 1.虚拟语气在非真实条件句中的具体用法:

情况 从句谓语动词 主句谓语动词 would/could/ should/might+动词原形 would/could/ should/might+have done would/could/ should/might+动词原形 与现在事实相反 过去式(be的过去式形式用were) 与过去事实相反 过去完成式 (1)were to do 与将来事实相反 (2)should do (3)过去式 If my brother were here,everything would be all right. 要是我哥哥在这儿的话,一切都没问题了。

If it should rain this afternoon, the basketball match would be put off. 要是今天下午下雨,篮球比赛就会被推迟。