you want．

　He will have arrived by now．

6．Would可表示过去反复发生的动作或某种倾向。would表过去习惯时比used to正式。并没有"现已无此习惯"的含义。The wound would not heal．

　During the vacation he would visit me every week．

7．表料想或猜想。It would be about ten when he left home．

　What would she be doing there?

　I thought he would have told you all about it．

8．would like； Would like to do = want to 想要，为固定搭配。

　　 Would you like to go with me?

9. Will you...?　Would you like...? 表示肯定含义的请求劝说时，疑问句中一般用some, 而不是any。　　 Would you like some cake?

10. 否定结构中用will，一般不用would, won't you是一种委婉语气。

　　 Won't you sit down?

六．Shall, should 和ought to

1. shall用于第一人称表示征求对方的意见： What shall we do next?

2. shall用于第一、第三人称疑问句中．表示说话人征求对方的意见或向对方请示。Shall we begin our meeting? When shall we leave the hospital?

3. shall用于第二 、第三人称，表示说话人给对方的命令、警告、允诺或威胁。You shall fail if you don't work harder．(警告) ; He shall have a book when I finish reading (允诺); He shall be punished．(威胁)

4. 表示推测或可能。 They should finish the work by now.

5. should表示劝告、义务、建议、命令，其同义词是ought to；在疑问句中。通常用should代替ought to。We should learn some English. You should go to class right away. Should I open the window?

　注意： should的含义较多，用法灵活。现介绍三种其特殊用法。请看下面句子： I should think it would be better to try it again.我倒是认为最好再试一试。 You are mistaken. I should say.依我看，你是搞错了。

　　I should advise you not to do that我倒是劝你别这样做。

　　This is something I should have liked to ask you.这是我本来想问你的。

从以上例句可以看出：情态动词should用于第一人称时可以表示说话人的一种谦逊、客气、委婉的语气。

　　此外,Why / How_+ should结构表示说话人对某事不能理解，感到以外、赞叹、愤怒、惊异等感情，意思为"竟会"。例如：

Why should you be so late today? 你今天怎么来这么晚？

--Where is Betty living? Betty住哪儿？ --How should I?我怎么回知道。

I don't know why you should think that I did it.我真不知道你凭什么认为这件事是我干的。

6. should表示允许。It should be ready at noon.

7. should +have +过去分词, 表示应该做而实际上没有做到.

You should have started earlier.

8. should 和ought to 都为"应该"的意思，可用于各种人称。　　

---Ought he to go?　　---Yes. I think he ought to.

9. 表示要求，命令时，语气由 should（应该）、had better最好）、must（必须）渐强。

七．need和dare