英语虚拟语气用法，谢谢大家 混合虚拟语气的语法，谢谢大家啦
\u4e00\u9053\u82f1\u8bed\u5355\u9009\uff0c\u4e3a\u4ec0\u4e48\u6d89\u53ca\u5230\u865a\u62df\u8bed\u6c14\uff0c\u9ebb\u70e6\u5927\u5bb6\u5e2e\u5fd9\u770b\u770b\uff0c\u8c22\u8c22\u6d89\u53ca\u865a\u62df\u8bed\u6c14\u662f\u56e0\u4e3ademand\uff0c\u5177\u4f53\u539f\u56e0\u5982\u4e0b\uff1a
\u865a\u62df\u8bed\u6c14\u7528\u5728advice\u7b49\u540d\u8bcd\u540e\u7684\u4e3b\u8bed\u4ece\u53e5\u3001\u8868\u8bed\u4ece\u53e5\u548c\u540c\u4f4d\u8bed\u4ece\u53e5\u4e2d\uff0c\u5e38\u7528\u7684\u8fd9\u7c7b\u540d\u8bcd\u6709\uff1aadvice\uff0cdemand\uff0corder\uff0cnecessity\uff0cresolution\uff0cdecision\uff0cproposal\uff0crequirement\uff0csuggestion\uff0cidea\uff0crecommendation\uff0cpreference\uff0crequest\uff0cplan\uff0cmotion, desire, sentence \u7b49\uff0c\u8c13\u8bed\u7528\u52a8\u8bcd\u539f\u5f62\u6216\u201cshould+\u52a8\u8bcd\u539f\u5f62\u201d\u3002
\u4f8b\u5982\uff1a
The demand is that manuscripts (should) be written on one side only. \u6309\u7167\u8981\u6c42\uff0c\u624b\u7a3f\u5355\u9762\u8a8a\u5199\u3002
He issued the order that the troops (should) withdraw at once. \u4ed6\u547d\u4ee4\u90e8\u961f\u9a6c\u4e0a\u64a4\u9000\u3002
Their desire was that a treaty (should) be signed. \u4ed6\u4eec\u7684\u613f\u671b\u662f\u7b7e\u4e00\u4e2a\u6761\u7ea6\u3002
The sentence is that the murderer (should) be shot. \u5224\u51b3\u662f\u6740\u4eba\u72af\u6267\u884c\u67aa\u51b3\u3002
We will issue the regulation that the library (should) be open even on Sunday. \u6211\u4eec\u5c06\u53d1\u5e03\u89c4\u5b9a\uff0c\u56fe\u4e66\u9986\u5373\u4f7f\u5728\u661f\u671f\u5929\u4e5f\u8981\u5f00\u653e\u3002
It is my desire that all the members of the family (should) gather once a year. \u6211\u7684\u613f\u671b\u662f\uff0c\u5168\u4f53\u5bb6\u5ead\u6210\u5458\u6bcf\u5e74\u56e2\u5706\u4e00\u6b21\u3002
\u4f60\u662f\u4e0d\u662f\u8981\u95ee\u4ece\u53e5\u548c\u4e3b\u53e5\u4e0d\u662f\u540c\u65f6\u53d1\u751f\u7684\u60c5\u51b5\uff0c\u53c2\u8003\u5982\u4e0b\uff1a
\u7ed3\u679c\u4e3b\u53e5\u548c\u6761\u4ef6\u4ece\u53e5\u7684\u8c13\u8bed\u52a8\u4f5c\u82e5\u4e0d\u662f\u540c\u65f6\u53d1\u751f\u65f6\uff0c\u865a\u62df\u8bed\u6c14\u7684\u5f62\u5f0f\u5e94\u4f5c\u76f8\u5e94\u7684\u8c03\u6574\u3002\u3000\u3000\u4ece\u53e5\u7684\u52a8\u4f5c\u4e0e\u8fc7\u53bb\u4e8b\u5b9e\u76f8\u53cd\uff0c\u800c\u4e3b\u53e5\u7684\u52a8\u4f5c\u4e0e\u73b0\u5728\u6216\u73b0\u5728\u6b63\u5728\u53d1\u751f\u7684\u4e8b\u5b9e\u4e0d\u7b26\u3002\u5982\uff1a\u3000\u3000If I had worked hard at school, I would be an engineer, too. \u5982\u679c\u6211\u5728\u5b66\u6821\u5b66\u4e60\u523b\u82e6\u7684\u8bdd\uff0c\u6211\u73b0\u5728\u4e5f\u4f1a\u6210\u4e3a\u4e00\u4e2a\u5de5\u7a0b\u5e08\u4e86\u3000\u3000If they had informed us, we would not come here now. \u5982\u679c\u4ed6\u4eec\u901a\u77e5\u8fc7\u6211\u4eec\u7684\u8bdd\uff0c\u6211\u4eec\u73b0\u5728\u5c31\u4e0d\u4f1a\u6765\u8fd9\u91cc\u4e86\u3002\u3000\u3000\u4ece\u53e5\u7684\u52a8\u4f5c\u4e0e\u73b0\u5728\u4e8b\u5b9e\u76f8\u53cd\uff0c\u800c\u4e3b\u53e5\u7684\u52a8\u4f5c\u4e0e\u8fc7\u53bb\u4e8b\u5b9e\u4e0d\u7b26\u3002\u5982\uff1a\u3000\u3000If he were free today, we would have sent him to Beijing. \u5982\u679c\u4ed6\u4eca\u5929\u6709\u7a7a\u7684\u8bdd\uff0c\u6211\u4eec\u4f1a\u5df2\u7ecf\u6d3e\u4ed6\u53bb\u5317\u4eac\u4e86\u3002\u3000\u3000If he knew her, he would have greeted her. \u8981\u662f\u4ed6\u8ba4\u8bc6\u5979\u7684\u8bdd\uff0c\u4ed6\u80af\u5b9a\u4f1a\u53bb\u95ee\u5019\u5979\u4e86\u3002\u3000\u3000\u4ece\u53e5\u7684\u52a8\u4f5c\u4e0e\u8fc7\u53bb\u53d1\u751f\u7684\u60c5\u51b5\u76f8\u53cd\uff0c\u800c\u4e3b\u53e5\u7684\u52a8\u4f5c\u4e0e\u73b0\u5728\u6b63\u5728\u53d1\u751f\u7684\u60c5\u51b5\u76f8\u53cd\u3002\u5982\uff1a\u3000\u3000If it had not been raining too much, the crops would be growing much better. \u5982\u679c\u5929\u4e0d\u4e0b\u592a\u591a\u7684\u96e8\u7684\u8bdd\uff0c\u5e84\u7a3c\u4f1a\u957f\u5f97\u66f4\u597d\u3002\u3000\u3000If he had been working hard, he would be working in the office now. \u8981\u662f\u4ed6\u4e00\u76f4\u52aa\u529b\u5de5\u4f5c\u7684\u8bdd\uff0c\u4ed6\u73b0\u5728\u5df2\u8fdb\u4e86\u529e\u516c\u5ba4\u4e86\u3002\u3000\u3000
您说的第一种由without, but, but for, but that, otherwise等引导的虚拟条件句为“含蓄虚拟条件句”，也就是说他没有明显的像if这样表达假设的含义，表达的比较含蓄。
比如:Without water or air, nothing could live.这个句子为典型的含蓄虚拟条件句。
可以转换为if引导的非真实条件句
=If there were no water or air, nothing could live.
因此可以理解为“含蓄虚拟条件句”中主句的谓语动词形式和if引导的非真实条件句中主句的谓语动词形式是一致的，由时间决定。
即
与现在事实相反，用would/could...+动词原形
与过去事实相反，用would+had+动词的过去分词。
而as if/though引导的是状语从句，所以其后的谓语动词变化应该和if引导的非真实条件句中从句的变化形式一致。
也就是
与现在事实相反，用did/were
与过去事实相反，用had done
希望这样解释能够帮助你记忆虚拟语气的动词变化形式，望采纳，谢谢。
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绛旓細1)鍦铏氭嫙璇皵鐨勪粠鍙ヤ腑锛屽姩璇'be'鐨勮繃鍘绘椂鎬佷竴寰嬬敤"were"锛屼笉鐢╳as锛 鍗冲湪浠庡彞涓璪e鐢╳ere浠ｆ浛銆侷f I were you, I would go to look for him. 濡傛灉鎴戞槸浣狅紝灏变細鍘绘壘浠栥2)鐢 if you were me What would you do if you were me? 濡傛灉浣犳槸鎴戯紝浣犱細鎬庝箞鍋?3锛墂as涓昏鐢ㄥ湪It鈥榮 time缁撴瀯...
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