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【英语】2018届二轮复习“猜测”的情态动词讲练学案(2页word版)
2018届二轮复习表“猜测”的情态动词讲练 例1.Tom has several houses in London, so he ____ be very rich. a. may b. must c. can d. might 【解析】 must表示猜测意义时,把握性最大,意为“一定,必定”。仅用于肯定句,表示对现在的猜 测。根据题干中提供的信息“Tom has several houses in London”可知,汤姆肯定很富有。选b。 例2 — is jack on duty today? — it ____ be him. it’s his turn tomorrow. a. mustn’t b. won’t c. can’t d. needn’t 【解析】首先排除a、b两项,因为must与will的否定式不表示猜测。can’t表示“不可能”,needn’t表示“没有必要”。选c。 例3 — that woman has been taking care of the two white tigers for 8 years. — oh, dear! she ____ a lot of difficulties! a. could go through b. might go through c. ought to have gone through d. must have gone through 【解析】 根据for 8 years可知说话人认为在这八年中那位妇女一定经历过很多困难。must have done表示对已发生事情的肯定猜测。c项表示本应该经历困难而实际没有经历,不可选。选d。 例4 peter ____ come with us to night, but he isn’t very sure yet. a. must b. may c. can d. will 【解析】根据题干中的信 息“but he isn’t very sure yet”可知peter今晚和我们一起来的可能性不是很大,选b。may表示猜测时,其肯定程度要比must小。虽然may和might一般可以互换,但用might时,可能性更小。may / might后面接不定式 的一般式时,表示对现在或将来事情的猜测;may / might后面接不定式的进行式时,表示对正在发生的事情的猜测。如: he may / might be waiting at the station now. 他现在可能正在火车站等着。 例5 sorry I’m late. i ____ have turned off the alarm o’clock and gone back to sleep again. a. might b. should c. can d. will 【解析】句意为“我有可能把闹钟关掉后又睡着了”,是对过去的猜测,might have done正好表达此意。can表示猜测时只用于否定句和疑问句;should have done表示过去本应该发生却没有发生的事情。选a。may / might后面接不定式的完成式时,表示对过去事情的猜测,主要用于肯定句或否定句,不用于疑问句。 例6 — is john coming by train? — he should, but he ____ not. he likes driving his car. a. must b. can c. need d. may 【解析】根据答语“he should, but he ____ not. he likes driving his car.”可判断出说话人表示不太肯定的猜测。选d。 【小试牛刀】从a、b、c、d四个选项中,选出可以填入空白处的最佳选项。 1. — look! the clouds are gathering. — yes. I’m afraid it ____ be pouring down soon. a. can b. must c. should d. might 2. — was he present at the meeting yesterday? — he ____ not have attended it, for he was busy repairing his computer all the time. a. can b. might c. should d. must 3. — tom is never late for work. why is he absent today? — something ____ to him. a. must happen b. should have happened c . could have happened d. must have happened 4. — i heard they went skiing in the mountains last winter. — it ___ true because there was little snow there. a. may not be b. won’t be c. can’t be d. mustn’t be 5. — why didn’t tom come to the party last night? — he ____ not have wanted to see me. a. should b. would c. could d. might key: 1-5 dadcd查看更多