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  1.If sb had done sth(坏事), sb would never have done sth(功德).

　　假如或人曩昔做了某事(坏事)，那么他永久不行能做某事

　　If Hugh Miller, after toiling all day in quarry (采石场), had devoted his evenings to rest and recreation, he would never have become a famous geologist.

　　2.Sb would never have done sth(功德1) , never have done sth (功德2), if sb had done sth (坏事)

　　或人永久不行能做某事， 永久不行能做某事， 假如或人曩昔做了某件坏事

　　The celebrated mathematician, Edmund Stone, would never have published a mathematical dictionary, never have found the key to science of mathematics, if he had given his spare moments to idleness.

　　3.Had sb done sth(坏事) ， sb would never have done sth (功德)

　　假如或人曩昔做了某件坏事，而不是去做某件功德，那么他永久不行能做某事(功德)

　　Had the little Scotch lad, Ferguson, allowed the busy brain to go to sleep while he tended sheep on the hillside, instead of calculating the position of the stars by a string of beads, he would never have become a famous astronomer.

　　对以上几个虚拟语气的使用范文

　　Group discussion Google

　　If Google had ignored the importance of group discussion, this high-tech company would never have achieved today's stunning success.

　　(If sb had done sth, he would never have done sth)

　　Google, a once obscure, ailing / fragile company, would never have achieved today's stunning success, never have conquered so big a market share, if it had ignored the importance of group discussion.

　　(sb would never have done sth , never have done sth , if sb had done sth)

　　Had Google , a once small , obscure company , ignored the importance of group discussion ，the hi-tech tycoon would never , never have harvested today's overwhelming success . (压倒性的成功)

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