will表推测,只能用于肯定句,“可能,该是”
的意思
历年高考试题对情态动词的考查热点有:1.情态动词+do表对现在推测的用法.2.情态动词+have+done结构表过去推测或虚拟的用法.3.shall表命令、指示、意图、允诺;义务、规定的用法.4.must表主张或与说话人愿望相反及不耐烦.下面就结合历年高考试题对情态动词的常见考点进行总结与归纳.
2)shall在条约、规章、法令等文件中用于第三人称,表义务或规定,“应/必须”.
e.g.①Ithasbeenannouncedthatcandidates___remainintheirseatsuntilallthepapershavebeencollected.(2002年上海卷)
A.canB.willC.mayD.shall
[分析]答案D.句意:已经宣布了试卷全部收回后应试者才可离开座位.shall表命令或指示;may/can表允许;will表意愿.
[表示推测]大概,该是Iwouldbeabouttenwhenmybrotherlefthome.我哥哥离开家时,我大概十岁左右它表示可能性很大,而would和它用法很相似。ill和would的用法1.表示请求、建议等,would比will委婉客气。如:Wouldyoupassmethebook?2.表示意志、愿望和决心。如:Iwillneverdothatagain.Theyaskedifwewoulddothatagain.Thedoorwon'topen3.用“willbe”和“will(would)+have+过去分词”的结构表示推测,主要用于第二、三人称。前者表示对目前情况的推测,后者表示对已经完成的动作或事态的推测。如:Thiswillbethebookyouwant.Hewillhavearrivedbynow.Theguestswouldhavearrivedbythattime.Ithoughtyouwouldhavefinishedthisbynow.4.Would可表示过去反复发生的动作或某种倾向。Would表过去习惯时比usedto正式,并没有“现已无此习惯”的含义。如:Thewoundwouldnotheal.Duringthevacationhewouldvisitmeeveryweek.5.表料想或猜想。如:Itwouldbeabouttenwhenhelefthome.Whatwouldshebedoingthere?Ithoughthewouldhavetoldyouallaboutit.