情态动词也可以和动词进行形式或完成进行形式构成谓语：表示“应当正在……”，“想必正在……”的意思。
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【例如】
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why should we be sitting here doing nothing?
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she might still be thinking about the question you raised.
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he can't be swimming in such weather.; f6 g" E! P4 W1 P s4 K
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at the moment she may (might) be playing with her schoolmates.
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7 u( g8 s) a5 ?0 P& Y we needn't be standing here in the rain. we might take shelter in the hut over there.
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+ k& j9 h' E$ p0 F" O/ ~ 情态动词间或也可以和一个动词的完成进行形式构成谓语，表示“应当一直在……”，“想必一直在……”这类意思。, [4 i# j+ ~7 a, S. ?& m9 r4 e
0 q+ T/ L) H4 Y5 e6 T, B$ n 【例如】
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they are sweating all over. they must have been working in the fields.
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8 y: M0 z; r8 b1 K3 Z4 i they may have been discussing the problem this morning.
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9 x9 @6 K) s4 L7 t+ H0 U she couldn't have been swimming all day. |
发表于 2012-8-14 00:30:10
