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回mm,我也是东搜搜西看看...半瓶子醋。。。 以下摘自Ron _____________________________________________________________ Siying What's the difference between "derive" and "are derived"? -- This is one of VERY few verbs whose meaning isn't verv different between active and passive forms. X derives fmm Y -> Y is the source of X (general statement of fact) Sugar derives from sugarcane. Species X derive from species Y (through evolution) X is derived from Y -> this is actually performed (usually by people) Sugar is derived rom sugarcane ->True (people do this) Species X is derived from species Y -> Doesn't make sense, unless you are talking about literally making species in a lab. ________________________________________________________________________ 还有一种解释是,prove是系动词,和sound什么的一样都可以用主动表示被动...
另外看看这个帖子会不会有启发, adj n vs n to be adj 形容词描述的是名词的内在属性,不定式描述的是被赋予的属性。 http://www.manhattangmat.com/forums/although-the-first-pulsar-or-rapidly-spinning-collapsed-t3500.html
其他的...再听听mm的想法 |
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