请教大家：Prep2008-P1-239

luer213

239.

Were it not for the fusion-powered heat and radiation that rush from its core, instead its own weight would cause a star to collapse.
A. instead its own weight would cause a star to collapse

B. instead a star would have collapsed under its own weight

C. a star would have to be collapsing under its own weight

D. a star would collapse under its own weight（答案）

E. its own weight would have caused a star’s collapse

句子使用了虚拟语气，有什么省略的语法规定么？因为 “ Were it not for the fusion-powered heat and radiation that rush from its core,  a star would collapse under its own weight." 是两个句子，怎么没有连词连接两个句子呢？我选的是B。

luer213

怎么没人理呀，是不是大家都觉得题目太简单了呀。自己先顶一个，望大家围观解答 O(∩_∩)O~

dzxu

经典的虚拟语气倒装，完整的句子是If it were not for the fusion-powered heat and radiation……，if是连接词，倒装后省略了，所以没有语法问题。

从句用were，主句用would，表对“现在”或“将来”的虚拟。

luer213

明白，谢谢啦~\(≧▽≦)/~