情态动词must和should

must.

(表示必要、命令或强制)必须,得

You mustn't talk like that. 你可不能这样说话。

You must do as you are told. 你必须遵嘱行事。

We must be home by six. 我们必须在六点以前回家。

2. (表示肯定的推测)一定是,谅必,八成

This must be your room. 这一定是你的房间了。

He must be eighty now. 他现在很可能有八十岁了。

3. (表示不可避免性)必然要,必定会

All men must die. 人总有一死。

4. (表示主张)一定要,坚持要

If you must go, at least wait till the rain stops.

如果你坚持要走,至少也要等雨停了再走。

5. (表示与说话人愿望相反)偏要

The machine must break down at this busy hour. 正忙的时候机器偏偏坏了。n.[S]

1. 必须做的事;不可少的事物

A walking stick is a must for me now. 如今我行走离不开手杖了。

2. 一定要看(或听、读)的东西

a.

1. 绝对必要的,必须的[B]

Shall

1. (shall的过去式,表示过去将来)将

We hoped that we should be able to do that.我们希望我们能这样做。

2. (表示语气较强的假设)万一,竟然

If the car should break down on the way, you would have to walk back.

万一汽车中途抛锚,你就得走回来。

3. (表示可能性、推测、推论或期待)可能,该

She should be here any minute.她该马上就到。

Dinner should be ready by now.此刻晚饭应该做好了。

4. (表示义务、责任)应该,应当

You should do as she says.你应当照她说的去做。

He should work harder.应该更加努力。

You should help your mother with the housework.你应该帮你母亲做家务。

5. (表示委婉、谦逊)可,倒

6. (表示感情、意志等)竟然会;应该

I'm sorry it should be this way.很遗憾,事情竟会是这个样子。

It's strange that he should be absent.真奇怪,他竟会缺席。

You shouldn't have told him about it.你不该把这件事告诉他的。

7. (表示建议、命令、决定等)应该,必须

Crime should be punished.犯罪应受惩罚。

8. (表示目的)会,可以

He stood away so that we should enter the room first.他让开一步,让我们先进屋。

9. (表示结果、意愿等)就,该

10. (表示征求同意等)可以,该

Who should I see about my schedule?关于我的日程该和谁商讨?