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。+ M4 X9 G& _+ S/ f& u. U
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【例如】
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+ ^' X& T* A# v, N$ ^: j* y; ^ why should we be sitting here doing nothing?7 g) q8 K4 @0 u# V8 H* Z: i
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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.
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) c9 U9 {, b, s$ y, C) m" [+ ?+ X at the moment she may (might) be playing with her schoolmates.
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" @8 c7 I1 v( Q7 L2 u& d0 O we needn't be standing here in the rain. we might take shelter in the hut over there.; a: U q9 g) p: b |! E0 w
+ ?$ Q6 X) v8 H f4 l 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。: T/ W0 y0 ^6 p. I8 T, j0 v- \
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【例如】3 s) j1 Z; u& n( Q7 r
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they are sweating all over. they must have been working in the fields.; }3 f2 C3 J& Q9 M
" `$ f* p% `3 x0 Y) S7 o, C; f: G they may have been discussing the problem this morning./ h' I+ f7 G, K( i! m
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she couldn't have been swimming all day. |
发表于 2012-8-14 00:30:10
