英语六级语法精要情态动词
<p> 情态动词:</p><p> <span word="may">may</span>/<span word="might">might</span>表示允许和可能:</p><p> 允许: 询问或说明一件事可不可以做.</p><p> <span word="May">May</span> <span word="I">I</span> <span word="trouble">trouble</span> <span word="you">you</span> <span word="with">with</span> <span word="a">a</span> <span word="question">question</span>?</p><p> <span word="You">You</span> <span word="may">may</span> <span word="take">take</span> <span word="this">this</span> <span word="seat">seat</span> <span word="if">if</span> <span word="you">you</span> <span word="like">like</span>.</p><p> <span word="He">He</span> <span word="asked">asked</span> <span word="if">if</span> <span word="he">he</span> <span word="might">might</span> <span word="glance">glance</span> <span word="through">through</span> <span word="my">my</span> <span word="album">album</span>.</p><p> <span word="You">You</span> <span word="might">might</span> <span word="as">as</span> <span word="well">well</span> <span word="speak">speak</span> <span word="your">your</span> <span word="mind">mind</span>.</p><p> 可能: 表示一件事或许发生.</p><p> <span word="You">You</span> <span word="may">may</span> <span word="walk">walk</span> <span word="ten">ten</span> <span word="miles">miles</span> <span word="without">without</span> <span word="seeing">seeing</span> <span word="a">a</span> <span word="house">house</span>.</p><p> <span word="She">She</span> <span word="was">was</span> <span word="afraid">afraid</span> <span word="they">they</span> <span word="might">might</span> <span word="not">not</span> <span word="like">like</span> <span word="the">the</span> <span word="idea">idea</span>.</p><p> <span word="A">A</span> <span word="bad">bad</span> <span word="thing">thing</span> <span word="might">might</span> <span word="be">be</span> <span word="turned">turned</span> <span word="to">to</span> <span word="good">good</span> <span word="account">account</span>.</p><p> <span word="might">might</span> 表示请求:</p><p> <span word="Might">Might</span> <span word="I">I</span> <span word="ask">ask</span> <span word="for">for</span> <span word="a">a</span> <span word="photograph">photograph</span> <span word="of">of</span> <span word="your">your</span> <span word="baby">baby</span>?</p><p> <span word="cant">cant</span>, <span word="couldnt">couldnt</span>表示否定的推测:</p><p> <span word="She">She</span> <span word="cant">cant</span> <span word="be">be</span> <span word="serious">serious</span>.</p><p> <span word="A">A</span> <span word="more">more</span> <span word="suitable">suitable</span> <span word="book">book</span> <span word="cant">cant</span> <span word="be">be</span> <span word="found">found</span>.</p><p> <span word="He">He</span> <span word="couldnt">couldnt</span> <span word="be">be</span> <span word="over">over</span> <span word="fifty">fifty</span>.</p><p> <span word="should">should</span>, <span word="ought">ought</span> <span word="to">to</span>: 表示应该做的事, <span word="ought">ought</span> <span word="to">to</span>比<span word="should">should</span>口气稍重一些.</p><p> <span word="You">You</span> <span word="should">should</span> <span word="do">do</span> <span word="as">as</span> <span word="he">he</span> <span word="says">says</span>.</p><p> <span word="You">You</span> <span word="shouldnt">shouldnt</span> <span word="talk">talk</span> <span word="like">like</span> <span word="that">that</span>.</p><p> 但这两者间也有一些差别, 在表示责任, 义务等该做的事情时, 常用<span word="ought">ought</span> <span word="to">to</span>, 在表示某件事宜于做时, 多用<span word="should">should</span>, 在下面的句子中这两个词就不宜换用:</p><p> <span word="You">You</span> <span word="are">are</span> <span word="his">his</span> <span word="father">father</span>. <span word="You">You</span> <span word="ought">ought</span> <span word="to">to</span> <span word="take">take</span> <span word="care">care</span> <span word="of">of</span> <span word="him">him</span>.</p><p> <span word="We">We</span> <span word="should">should</span> <span word="not">not</span> <span word="use">use</span> <span word="too">too</span> <span word="many">many</span> <span word="big">big</span> <span word="words">words</span> <span word="in">in</span> <span word="our">our</span> <span word="everyday">everyday</span> <span word="speech">speech</span>.</p>
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