Lesson127AfamousactressGrammarfocus•情态动词表示推测：•情态动词表示推测的有：must一定、could很有可能、may可能、might有一些可能。它们的用法是：•1.它们表示推测只能用于肯定句之中，而疑问句用can，否定句用can’t不可能。•例：Canthehestayathomeatthemoment?现在他能在家么？•Hemustbestayingathome.他一定在家。•Hecan’tbestayingathome.他不可能在家。2.情态动词+原形，表示对现在或将来的情况时行推测。•例：Hemustbeateacher.•他可能是一名老师。（系表）•Wemaytravelbyseanextmonth.•下个月，我们可能乘船旅行。Page43.情态动词+bedoing，表示对现在的情况进行推测。例：Hemustbehavingalotofmoney.他一定有很多钱。Jimmaybeplayingthebasketball.吉姆可能正在打篮球。4.情态动词+havedone，表示对过去的情况进行推测。•例：Itmusthaverainedyesterday.•昨天一定下雨了。•Ican’thavebeenlateyesterday.•我昨天不可能迟到。•Shecouldhavephonedyoulastnight.•她昨晚应该给你打电话了。练习答案KeytowrittenexercisesA1Hehastobehereatsixo'clock.2Ithinkheisprobablybusy.3Hehastobeattheofficeearlytomorrow.练习答案KeytowrittenexercisesA4Ithinkheisprobablysleeping.5IthinkheisprobablyFrench.6HehastobeinFrancenextweek.7Ithinkheisprobablyanengineer.B1Idon'tthinkso.Shecan'tbeItalian.ShemustbeGreek.2Idon'tthinkso.Hecan'tbeEnglish.HemustbeAmerican.3Idon'tthinkso.Theycan'tbeCanadian.TheymustbeAustralian.4Idon'tthinkso.Hecan'tbeamechanic.Hemustbeanengineer.5Idon'tthinkso.Hecan'tbeabusconductor.Hemustbeabusdriver.6Idon'tthinkso.Hecan'tbeasalesrep.Hemustbetheboss.7Idon'tthinkso.Hecan'tbetwenty-four.Hemustbethirty.8Idon'tthinkso.Theycan'tbefive.Theymustbesev9Idon'tthinkso.Hecan'tbeseventy-six.Hemustbeovereighty.10Idon'tthinkso.Shecan'tbefifty-five.Shemustbeunderfifty.11Idon'tthinkso.Itcan'tbethe21sttoday.Itmustbethe20th.12Idon'tthinkso.Itcan'tbeTuesdaytoday.ItmustbeWednesday.13Idon'tthinkso.Itcan'tbethe2ndtoday.Itmustbethe3rd.14Idon'tthinkso.Itcan'tbecheap.Itmustbeexpensive.15Idon'tthinkso.Itcan'tbeeasy.Itmustbedifficult.16Idon'tthinkso.Shecan'tbeold.Shemustbeyoung.17Idon'tthinkso.Theycan'tbeearly.Theymustbelate.1...
