Model Verbs

must have rained last night. 3. The road is wet. It ________________
(rain)
must have been looking for you. 4. Your mother ______________________
你妈妈一定一直在找你。
work by bus this morning.
迈克一定还没有找回他的车，因为早上他是坐
公共汽车来上班的。
2： --_____the news be true? A —No, it_____be true. A. Can, can’t B. May, can’t C. May, may not D. Must, mustn’t
I didn’t hear the telephone. I must have been/fallen asleep. __________________ 3) He must have finished his homework for a long time, ＿ hasn’t he?
3) 地是湿的， 昨天晚上一定下雨了。
• 三. must be doing sth表示对现在正在进行的 动作进行推测, 意思是“一定/肯定是正在 做…” • 1) 他现在肯定呆在那里。 must be staying • He _______________ there. • 2) 他们肯定在园子了浇花呢。 must be watering • They ________________the flowers in the garden.
四. must have done sth 表示对过去发生的事情进 行推测，“一定/肯定…了，一定/肯定已经…了”
1) 他一定是挣了一笔巨款。
must have earned He _________________a large sum of money.
2) 我当时没有听到电话，想必我是睡着了。
must have rained last night. The road is wet. It ________________ 五. Can/could have done sth 对过去发生的事情进行推测, 常用 在疑问句和否定句中, 意思是“可能(已经)…” 1) 她会说谎吗? Can she __________ have told a lie? ______ 2) 门是锁着的, 她不可能在家. The door was locked. She _____________________ can’t/couldn’t have been at home. 六. Can/could be doing sth “可能正在做…” 她不可能在撒谎. can’t be tellinglies. She ____________
2) 安到现在还没来, 可能/也许她今天忙.
may/might/could be Ann hasn’t come yet. She __________________ busy today.
情态动词对过去的推测
must have done 一定已做 can’t / couldn’t have done不可能做 Should/ ought to have done 本来应做而 未做（责备） could have done本能做而实际未做(遗憾） Should have done 本来应做而未做 ought to have done （责备） may/might have done可能已做
He is at home.（事实）
• • • •
He might not be at home.（也许不在家） He may not be at home. （比might可能） He couldn’t be at home.很可能不在家） He can’t be at home.（一定不在家）
He isn’t at home.
3 对当前发生的事情或情况做出“不太肯定”的 推测时, 用may / might /could, 相当于“也许, 有 可能”. Might和could不是过去时态, 它们和may 一样, 都表示“现在的推测”, 但在语气上较为委 婉或是可能性更小一些. 1) 杰克将演戏, 他可能会演贝克汉姆这个角色. Jack will act in the play. He _________________act the role of Beckham. may/might/could
may be in 1. I don't know where she is, she _______ Wuhan. must be marking 2. At this moment, our teacher ________________
our exam papers.
这时，我们老师想必在批改试卷。一定，必定
ought to should
大概、应该
can could
uncertainty
可能 也许
may might
不同的“肯定”程度可按下列层次排列：
He must be at home.（非常肯定的推断） He ought to be at home.（很可能） He should be at home.（很可能） He may be at home.（仅仅可能而已） He might be at home.（或许, 非常不确定）
may (might) have been hurt seriously in 5. Philip ________________________ the car accident. 菲利普可能在车祸中受了重伤. 6. ---Linda has gone to work, but her bicycle is still here. may (might) have gone (go) by bus. ---She _____________________ 7. Mike ________________ can’t have found his car, for he came to