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2023年初中英语学习语法冲刺复习之情态动词的用法

日期:2024-05-13 科目:英语 类型:初中教案 查看:93次 大小:16316Byte 来源:二一课件通
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2023年,初中,英语学习,语法,冲刺,习之
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2023年初中英语学习语法冲刺复习之情态动词的用法 一、用“情态动词+have +done”结构表示对过去动作的推测,试题中常用过去时态或过去的时间状语给以暗示。情态动词的这一用法可以用 “对立统一”来概括。 1.当试题的前句和后句在动作和意义上相互补充说明,且整个句意在动作和时间上是一个整体时,我们可用“统一”关系来解决这样的试题。常见的结构有: must have done: 表示对过去动作的肯定推测,常译作“一定做了……”,只能用于肯定句中。其否定形式为can't/couldn't have done 疑问式为Can/Could...have done 。 could /might have done:表示对过去发生的动作的可能性推测,常译作“可能做了……”。如: 1) Sorry I'm late. I _____ have turned off the alarm clock and gone back to sleep again. A. might B. Should C. can D. will 该题前句说明了结果,后句接着说出了产生这种结果的可能性,对前句进行补充说明。分析选项可知本题应选A。 2) My sister met him at the Grand Theater yesterday afternoon, so he ____ your lecture. A.couldn't have attended B.needn't have attended C.mustn't have attended D.shouldn't have attended 该题前句叙说一个客观事实,后句对前句进行补充说明,分析选项可知C是错误的; 而B、D两项不符合题意。故本题选A。又如: Jack ____ yet, otherwise he would have telephoned me. A.mustn't have arrived B.shouldn't have arrived C.can't have arrived D.need not have arrived (本题选C) 2.当试题的前后句在动作和意义上构成转折关系时,常借助“but, however, instead”等词来表示过去的动作与客观事实不符,这时我们就可以用“对立”关系来解决这样的试题。这种结构常见的有: should have done / ought to have done:表示过去本应该做某事而实际上没有做。 should not have done / ought not to have done:表示过去本不应该做某事但事实上却做了。 need have done:表示过去本来有必要去做某事,但事实上没有做。 need not have done:表示过去本来没有必要做某事,但事实上却做了。如: 3) I was really anxious about you. You _____ home without a word. A.mustn't leave B.shouldn't have left C.couldn't have left D.needn't leave 分析该题前后句之间的关系和语气可知,事实上是 “本不应该离家出走却走了”,故本题选B。 4) I told Sally how to get here, but perhaps I _____ for her. A.had to write it out B.must have written it out C.should have written it out D.ought to write it out 由句中的连词but可知前后句之间是对立关系,分析题意可知本题应选C。 二、考查情态动词基本用法之间的比较和辨析。试题中常借助具体的语境来考查考生对那些最常见的情态动词的基本用法的理解和掌握,因此在做这样的试题时应认真分析语境中所含的实际意义,并结合情态动词的基本含义和用法做出正确的选择。 5) —Is John coming by train —He should, but he _____ not. He likes driving his car. A.must B.can C.need D.may mustn't 表示“禁止、不准”;cannot 表示“不可能”;need not 表示“不必要”;may not 表示“可能不”。分析语境可知本题应选D。 6) —I hear you've got a set of valuable Australian coins.___ I have a look —Yes, certainly. A.Do B.May C. Shall D.Should 分析语境可知这是在征求对方的许可,may表示“允许、可以”,语气比较委婉 shall常用于第一、三人称作主语的疑问句中,表示征求对方意见和指示,如果此空用shall,则意为“要(我)看一下吗 ”,不符合上下文意思。故本题选B。 7) Mr. Bush is on time for everything. ... ...

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