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A 用于推测过去的行动: He may/might have gone.相当于: It is possible that he went/has gone./Perhaps he went/has gone. 当时他可能去了。 如第132节D所述,如果主句的动词是过去时,就必须用might: He said/thought that she might have missed the plane. 他说/想她可能已经误了那班飞机。 如不确定性已然消失,必须用 might而不用 may: He came home alone.You shouldn't have let him do that;he might have got lost. 他独自回家了。你本不应当让他那么做的,他可能会迷路的。(但他并未迷路。) 在下一句中也是这样: You shouldn't have drunk1 the wine;it may/might have been drugged. 你本不应喝那酒的,里边可能放了药。 it may have been drugged通常表示还不能确定酒里是否放了迷药。 it might have been drugged也可具有与上述相同的含义,但也可能意指现在知道酒里没有迷药。 在叙述最终并未得到检验的事情时用 might而不用 may: Perhaps we should have taken the other road.It might have been quick- er. 也许我们本应当走另一条路。那样可能更快些。 It's a good thing you didn't lend him the money.You might never have got it back. 你没借给他钱倒是好事。如果你借给了他,就可能永远也要不回来了。 上述这类例句同条件句的第三种类型非常相似: If we had taken the other road we might have arrived earlier. 如果我们当时走了另一条路,就可能到得早一些。 B may/might可用于条件句中以代替will/would,表示一种可能的而不是肯定无疑的结果: If he sees you he will stop. 如果他看见你,他就会停下来。(确定的) If he sees you he may stop. 如果他看见你,他可能停下来。(可能的) 同样, may/might也可用于下列句子当中: If you poured hot water into it,it might crack2. 你如果往它里面倒进热水的话,它就可能裂开。 If you had left it there someone might have stolen it. 要是你当时把那东西落在那里,就可能有人把它偷走。(参见第223节B。) 点击收听单词发音
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