【英语】2018届二轮复习“猜测”的情态动词讲练学案（2页word版）

【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