【—之条件状语从句】下面就是老师为同学们带来的条件状语从句的详细讲解,供同学们学习的参考。
条件状语从句
1、与现在事实相反
若与现在事实相反,虚拟语气的条件从句的谓语用过去式(be通常用were),主句谓语用“should (would, could, might)+动词原形”。如:
If I were you, I would take an umbrella. 如果我是你,我会带把伞。(事实上我不可能是你)
If I knew her number I could ring her up. 要是我知道她的电话号码,我就可以给她打电话了。(事实上我不知道)
2、与过去事实相反
若与过去事实相反,从句:主语+had done , 主句:主语+should/would/could/might+have done ,例如:
If I'd left sooner,I'd have been on time. 要是我早点动身,我就准时到了。(但我动身太迟了)
If I had got there earlier, I should/could have met her. 如果我早到那儿,我就会见到她。 (事实:去晚了)
3、与将来事实相反
从句:①if+主语+were to do 主句:①主语+should/would/could/might+do
②if+主语+did/were ②主语+should/would/could/might+do
③if+主语+should+do ③主语+should/would/could/might+do
例如:If he went,would you go too? 如果他去,你也去吗?(大概他不会去)
If he should come here tomorrow, I would talk to him. 如果他明天来这儿的话,我就跟他谈谈。 (事实:来的可能性很小)
注意与说明:对于与将来事实相反的情形,请注意以下几点:
一是这里说的与将来事实相反,实为对将来情况的推测;
二是此用法中的条件从句谓语除用过去式外,有时也用“should+动词原形”(表示可能性极小,常译为“万一”)或“were to+动词原形”(表示与将来事实相反的假设);
三是当条件从句使用“should+动词原形”这样的谓语时,主句谓语除可用“should (would, could, might)+动词原形”这样的虚拟语气外,也可用陈述语气或祈使语气。如:
I should see him, I'll tell him. 万一我见到他,我就告诉他。
If it should rain tomorrow, don’t expect me. 万一明天下雨,就别等我了。
上述是老师为同学们带来的对条件状语从句的讲解,有不懂得可以参考哦!
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