You need have no anxiety on my account .你不必为我而着急。

　　dare , dared（用于否定句、疑问句和疑问句）敢

　　Dare you stay here alone in the night ？ 你敢在夜里呆在这儿吗？

　　Nobody dared mention that matter. 没有人敢提那件事。

　　How dared you say that to her ？ 你怎么敢对她说那件事？

　　Even if you dare do it , I won't allow you to because it's too dangerous .

　　即使你敢做，我也会让你做那件事，因为太危险了

　　shall 用作情态动词时,适用于第二人称和第三人称。

　　主要表示下面几层意思：

　　1）许诺

　　You shall hear everything directly you come .你一来就可以听到一切了。

　　"Whatever you want you shall have , "said the Fairy .

　　仙女说："你想得到什么，你就可以有什么。"

　　I don't want to be hard on your daughter ; she shan't be pressed .

　　我不想对你女儿太严厉，她不会太受压的。

　　I promise that you shall see her again before long .

　　我保证你不久就能再见到她。

　　2）命令

　　You shall come to my office immediately .你必须马上来我的办公室。

　　She shall not stay in my garden .她不可以呆在我的花园里。

　　He shall not come into my study . 不许他进我的书房。

　　You shall do as you are told .按告诉你的那么做。

　　3）决心（表示某事一定会发生）

　　That day shall come .那一天一定会到来。

　　It has been decided that he shall be given the job .

　　肯定给他那份工作的事已经定下来了。

　　This law shall come into effect on January 1st 2001

　　这个法律于2001年元月1日生效。

　　4）规定

　　Each competitor shall wear a number .每个参赛者要佩戴一个数字标。

　　The renter shall keep the house in a neat and orderly state .

　　租赁者要保持房屋整洁有序。

　　The supplier shall make shipment before October and the purchaser shall make payment within 15 days after

　　receipt of the goods .卖方十月以前装运，买方在收到货物后十五天内付款。

　　should　　（用作情态动词时，有时表示具体的意思，有时却没有意义。主要用于下面几个方面。）

　　1）表示出于职责、义务该做某事

　　You shouldn't come to such a decision hastily .

　　你不应该匆匆忙忙地作出这么一个决定。

　　You should write to your parents at least once a month .

　　你应该至少每月给你父母亲写一封信。

　　We should read English aloud every morning .

　　我们应该每天早晨朗读英文。

　　They should do it for their own good .

　　为了他们自己利益他们应该做这件事。

　　2）表示对某种情况的估计

　　She shouldn't be out in such an early morning .

　　她不会这么一大早就出去了吧。

　　The effect of the tax should be felt in higher prices .

　　人们可能会从各种上涨的物价中感觉到这种税的影响的。

　　The event should lead them to a even worse economic crisis.这次事件可能会将他们引向更严重的经济危机。

　　This book should be published in two months at most .

　　这本书最多两个月后就会出版的。

　　3）表示惊讶、失望等情绪

　　I think it is dreadful that anyone should be so miserable.

　　我认为，竟然每个人都如此伤心就太糟糕了。

　　Why should I pay him for nothing ？ 我干吗要无为地付给他钱？

　　It seems so unfair that this should happen to me .