唐唐sweet
虚拟语气英语，回答如下：
虚拟语气是一种特殊的动词形式，用来表示说话人所说的话不是事实，而是一种假设、愿望、怀疑、建议、猜测、可能或纯粹的空想等，通常由 if 引导的状语从句与主句构成。
五种基本句型：
1、纯条件虚拟语气
(1) 句型if + 主语 + 一般现在时动词，主语 + will/may/can/shall/must/ought to/should + 原型动词。例如：If you make a mistake, you should admit it. 假如你犯了错，应该承认。
(2) 表纯条件结构的副词连词不只 if 一种，once(一旦 = as soon as)、when(当)、unless(除非)等连词也可构成条件句，用法与 if 相同，即条件句使用一般现在时，主句使用一般将来时。例如：Once/If you make a mistake, I will punish you. 如果你犯错了，我会处罚你。
2、与现在事实相反的虚拟语气
If + 主语 + 一般过去时动词，主语 + would/could/might/ought to/should + 原型动词注意，if 句子中若有 be 动词，一律为 were，而非 was。例如：If I were rich, I would buy my parents a villa. 如果我有钱会买别墅给我父母（我现在没钱）。
3、与过去事实相反的虚拟语气
If + 主语 + had + 过去分词， 主语 + would/could/might/ought to/should + have + 过去分词。例如：If he had been here yesterday, I would have seen him.如果昨天他在这儿，我就能看到他(他昨天不在这儿)。
4、与将来状况相反的虚拟语气
使用本虚拟语气时， if 从句一定要加助动词 should, 译成“万一”If + 主语 + should + 原形动词， 主语 + would/could/might/ought to/should + 原型动词。例如：The sky is blue. If it should rain, the picnic would be cancelled. 天空一片湛蓝，万一下雨，野餐将取消。
5、与真理相反的虚拟语气
If + 主语 + were to + 原形动词， 主语 + would/could/might/ought to/should + 原型动词。例如：If the sun were to rise in the west, the sunflower would be scared to death. 太阳从西方升起，向日葵会吓死。
南宫亦忆
Mr. Smith suggests that we should keep quiet.If I were you, I would talk to her about our relationship.I wish I were a bird flying in the sky.
草本Jing樺
虚拟语气有很多情况:例句倒是很多,楼主不晓得需要什么水平.先随便甩你几个虚拟语气:1.If I were you, I would take an umbrella.如果我是你，我会带把伞。（事实：我不可能是你） 2.If he had taken my advice, he would not have made such a mistake. 如果他听我的劝告的话，就不会犯这样的错误了。（事实：没有听我的话） 3.We didn’t know his telephone number; otherwise we would have telephoned him. 我们不知道他的电话号码，否则我们就会给他打电话。 4. She examined the door again for fear that a thief should come in. 她又把门检查了一遍，以防盗贼的进入。 5.He demand that we (should) take the teacher’s advice
