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. ①It has been announced that candidates ___remain in their seats until all the papers have been collected. (2002年上海卷)
A.can B. will C.may D.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.
再问： 谢谢你回答这么多 但对WILL表示推测的内容很少
再答： [表示推测]大概, 该是 I would be about ten when my brother left home. 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： Would you pass me the book? 2. 表示意志、愿望和决心。如： I will never do that again. They asked if we would do that again. The door won't open 3. 用“will be”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： This will be the book you want. He will have arrived by now. The guests would have arrived by that time. I thought you would have finished this by now. 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used to正式，并没有“现已无此习惯”的含义。如： The wound would not heal. During the vacation he would visit me every week. 5. 表料想或猜想。如： It would be about ten when he left home. What would she be doing there? I thought he would have told you all about it.
