1、常用“may+动词原形”表示祝愿，但愿，此时may须置于句首(多用于正式文体中)。　

⑴、May good luck be yours!祝你好运！　

⑵、May you be happy!祝你快乐！　

⑶、May you do even better!祝你取得更大成就！　

⑷、May you have a good time. 祝愿你玩的痛快。　

⑸、May the friendship between us last long. 祝愿我们的友情天长地久。　

⑹、May you be happy. (注意那个be ) 祝你幸福。　

(7)May the world be filled with love! 让世界充满爱！　

⑴.Would you be kind enough to show me the way to the post office?请你告诉我去邮局的路好吗？　

⑵.It would be better for you not to stay up too late.你最好别熬夜到很晚。　

1 语气(mood)　

语气是动词的一种形式，表示说话人对某一行为或事情的看法和态度。　

2 语气的种类　

⑴、陈述语气：表示动作或状态是现实的、确定的或符合事实的，用于陈述句、疑问句和某些感叹句。如：　

①There are two sides to every question.每个问题都有两个方面。　

②Were you busy all day yesterday? 昨天一整天你都很忙吗？　

③How good a teacher she is! 她是多好的一位老师啊！　

⑵、祈使语气：表示说话人对对方的请求或命令。如：　

①Never be late again!再也不要迟到了。　

②Don’t forget to turn off the light.别忘了关灯。　

⑶、虚拟语气：表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。如：　

①If I were a bird, I could fly in the air.如果我是一只小鸟，我就能在空中飞行。　 星沙英语

②I wish I could pass the examination.我希望我能通过考试。　

③May you succeed!祝您成功！　

虚拟语气在语法里算得上是个难点。让我们就从最简单的开始吧。　

16.9 need "不必做"和"本不该做"

didn’t need to do表示：过去不必做某事, 事实上也没做。.

needn’t have done表示：过去不必做某事, 但事实上做了。

John went to the station with the car to meet Mary, so she didn’t need to walk back home.

约翰开车去车站接玛丽，所以她不必步行回家了。

John went to the station with the car to meet Mary, so she needn’t have walked back home.

约翰开车去车站接玛丽，所以她本不必步行回家了。(Mary步行回家，没有遇上John的车。)

典型例题

　　 There was plenty of time. She ___.　

　　 A. mustn’t have hurried　 　　B. couldn’t have hurried　

　　 C. must not hurry　　　　　　 D. needn’t have hurried

　　 答案D。needn’t have done. 意为"本不必"，即已经做了某事，而时实际上不必要。

　　 Mustn’t have done 用法不正确，对过去发生的事情进行否定性推断应为couldn’t have done, "不可能已经"。 must not do 不可以 (用于一般现在时)。

16.8 It is (high) time that

It is (high) time that 后面的从句谓语动词要用过去式或用should加动词原形，但should不可省略。

It is time that the children went to bed.

It is high time that the children should go to bed.

16.7 比较if only与only if

only if表示"只有"；if only则表示"如果……就好了"。If only也可用于陈述语气。

I wake up only if the alarm clock rings. 只有闹钟响了，我才会醒。

If only the alarm clock had rung. 当时闹钟响了，就好了。

If only he comes early. 但愿他早点回来。

16.6 wish的用法

　　 1) 用于wish后面的从句，表示与事实相反的情况，或表示将来不太可能实现的愿望。其宾语从句的动词形式为：

　　　　　　　 真实状况　wish后　　 　

从句动作先于主句动词动作　现在时　过去时

(be的过去式为 were)　

从句动作与主句动作同时发生　过去时　过去完成时

(had + 过去分词)　　　　　　　　　

将来不大可能实现的愿望　　将来时　would/could + 动词原形　　

I wish I were as tall as you. 我希望和你一样高。

He wished he hadn’t said that. 他希望他没讲那样的话。

I wish it would rain tomorrow. 我希望明天下雨就好了。

2) Wish to do表达法。

Wish sb / sth to do

I wish to see the manager. = I want to see the manager.

I wish the manager to be informed at once. (= I want the manager to be informed at once.)

16.5 特殊的虚拟语气词：should

1) It is demanded / necessary / a pity + that…结构中的主语从句的谓语动词要用should 加动词原形， should 可省略。

句型：

(1) suggested

It is (2)important　　that…+ (should) do (3) a pity

(1) suggested, ordered, proposed, required, demanded, requested, insisted；+ (should) do　

(2) important, necessary, natural, strange

a pity, a shame, no wonder

(3) It is suggested that we (should) hold a meeting next week.

　 It is necessary that he (should) come to our meeting tomorrow.

2) 在宾语从句中的应用

　　 在表示命令、建议、要求等一类动词后面的从句中。

order, suggest, propose, require, demand, request, insist, command, insist + (should) do　

I suggest that we (should) hold a meeting next week.

He insisted that he (should ) be sent there.

注意： 如suggest, insist不表示"建议" 或"坚持要某人做某事时"，即它们用于其本意"暗示、表明"、"坚持认为"时，宾语从句用陈述语气。

The guard at gate insisted that everybody obey the rules.　

判断改错:

(错) You pale face suggests that you (should) be ill.　

(对) Your pale face suggests that you are ill.

(错) I insisted that you ( should) be wrong.

(对) I insisted that you were wrong.

3) 在表语从句，同位语从句中的应用

　　 在suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气，即(should)+动词原形。

　　 My idea is that we (should) get more people to attend the conference.

　　 I make a proposal that we (should) hold a meeting next week.

16.4 虚拟条件句的倒装

　　 虚拟条件句的从句部分如果含有were, should, 或had, 可将if省略，再把were, should或had 移到从句句首，实行倒装。

　　 Were they here now, they could help us.

　=If they were here now, they could help us.

　 Had you come earlier, you would have met him

　 =If you had come earlier, you would have met him.　

Should it rain, the crops would be saved.

　 =Were it to rain, the crops would be saved.

　　 注意：

　　 在虚拟语气的从句中，动词'be’的过去时态一律用"were"，不用was，即在从句中be用were代替。

　　 If I were you, I would go to look for him. 如果我是你，就会去找他。

　　 If he were here, everything would be all right.　 如果他在这儿，一切都会好的。

典型例题

　　 _____ to do the work, I should do it some other day.

　　 A. If were I　 B. I were　C. Were I　D. Was I　

　　 答案C. 在虚拟条件状语中如果有were, should, had这三个词，通常将if省略，主语提前, 变成 were, should, had +主语的形式。但要注意，在虚拟条件状语从句中，省略连词的倒装形式的句首不能用动词的缩略形式。如我们可说Were I not to do., 而不能说Weren’t I to do.

16.3 混合条件句

　　 主句与从句的动作发生在不同的时间，这时主，从句谓语动词的虚拟语气形式因时间不同而不同，这叫做混合条件句。

　　 If you had asked him yesterday, you would know what to do now.

　　 (从句与过去事实相反，主句与现在事实相反。)

　　 If it had rained last night (过去), it would be very cold today (现在).