非真实条件从句
由if,as if, as though引导的条件从句叫做一般条件句
所谓含蓄虚拟语气,就是句子里不出现明显的假设条件从句,但假想的条件隐含在上下文逻辑关系中,或通过一些语法手段得以体现,这种情况就称为含蓄虚拟语气。
--含蓄条件暗含在其他结构中。
(1)连词but(但是), or (else) (否则);副词otherwise(否则), unfortunately等表示转折假设。
如:
A safety analysis would have identified the target as a potential danger. Unfortunately, it was never done.
Victor obviously does not know what has happened; otherwise he wouldn't have made such a stupid remark.
(2)介词短语暗含假设条件,常用的有:without(若没有), but for / but that(要不是因为),except for(若没有),with(若带有), under more favorable conditions,in the absence of(在没有……的情况下),under the circumstances of(在……的情况下)等。
如:
But for the English examination I would have gone to the concert last Sunday.
(3)intended/meant/hoped/wished/plann或was/were +不定式完成式或had intended/meant/planned/hoped/wished +不定式一般式暗示虚拟语气。
如:I intended to have called on you, but I was busy at that time.(事实上我没打电话)
(4)情态动词完成式暗示虚拟语气。
如:I should have called to make an airline reservation.(事实上我没有)
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