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。
