1、用于第一、三人称，表示征求意见或请求指示。
2、 用于第二、三人称，表示意志、允诺、命令、威胁、警告等。在法律、条约、协定等文件中，表示义务、规定等。
如：1) Shall he go with you? (请求指示)
2) You shall have a lot of money.= I shall give you a lot of money.(允诺)
3) Each citizen shall carry his identification card when traveling. (规定)
shall
英 [ʃæl; ʃ(ə)l] 美 [ʃəl]
aux. 应；会；将；必须
同近义词
aux.应；会；将；必须
would / must
相关用法
1.情态动词 You use shall with "I" and "we" in questions in order to make offers or suggestions, or to ask for advice. 可以 (用于疑问句中“)(I)(”和“)(we)(”前，用以提供建议或征求意见)
例：
Shall I get the keys?
我拿钥匙可以吗？
例：
Well, shall we go?
那，我们走好吗？
例：
Let's have a nice little stroll, shall we?
咱们去好好散散步，好吗？
2.情态动词 You use shall, usually with "I" and "we," when you are referring to something that you intend to do, or when you are referring to something that you are sure will happen to you in the future. 将 (与“)(I)(”和“)(we)(”连用，表示意欲做某事或将要发生的事)
例：
We shall be landing in Paris in sixteen minutes, exactly on time.
我们将在16分钟后准时在巴黎降落。
例：
I shall know more next month, I hope.
我希望下个月我将知道更多。
3.情态动词 You use shall with "I" or "we" during a speech or piece of writing to say what you are going to discuss or explain later. 将 (与“)(I)(”和“)(we)(”连用，表示将要论及或解释的内容)
例：
In Chapter 3, I shall describe some of the documentation that I gathered.
在第3章，我将讲述我所搜集到的一些文献资料。
4.情态动词 You use shall to indicate that something must happen, usually because of a rule or law. You use shall not to indicate that something must not happen. 将 (指按规定或规律一定会发生)
例：
The president shall hold office for five years.
总统将任职5年。
5.情态动词 You use shall, usually with "you," when you are telling someone that they will be able to do or have something they want. 可以 (与“)(you)(”连用，用以告知某人能做某事或拥有想要的东西)
例：
Very well, if you want to go, go you shall.
很好，如果你想走的话
短语
1.I shall
好吧 | 我会 | 我须
2.shall fall
应下降 | 将会落下 | 秋款 | 应属于
3.how shall
如何应 | 应如何 | 我怎样 | 我怎么
4.shall include
应包括 | 应当包括
5.shall modal
将 | 将要
6.All shall
都将散去
7.Declined Shall
谢绝谈情
8.Shall suffer
吃苦头
9.may shall
可以用也可以不用
本回答被网友采纳Shall作为助动词，一般用于第一人称Ⅰ和We，表示一个将来的动作，构成将来时态。Shall后面接动词原形。例如：
I shall think it over and Let you know my idea.
我将考虑一下此事,然后告诉你我的想法。
We shall have a good time in the park.
我们在公园里会玩得很高兴的。
Shall用于第一人称,表示征求对方的意愿。
如：What shall we do this evening?
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。
如：Shall we begin our lesson?
When shall he be able to leave the hospital?
Shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁。
如：You shall fail if you don't work harder.（警告）
He shall have the book when I finish reading.（允诺）
He shall be punished.（威胁）