【往期回顧】
接下來我們繼續來看第63課的“每課一句”：
一、課文原文
Lesson 63 Thank you , doctor.
How's Jimmy today?
He's better, thank you, doctor.
Can I see him please, Mrs. Williams?
Certainly, doctor. Come upstairs.
You look very well, Jimmy. You are better now, but you mustn't get up yet. You must stay in bed for another two days.
The boy mustn't go to school yet, Mrs. Williams. And he mustn't eat rich food.
Does he have a temperature, doctor?
No, he doesn’t.
Must he stay in bed?
Yes. He must remain in bed for another two days. He can get up for about two hours each day, but you must keep the room warm.
Where's Mr. Williams this evening?
He's in bed, doctor.
Can you see him, please? He has a bad cold, too!
——選自《新概念英語》第一冊，外語教學與研究出版社，1997年10月第1版
二、每課一句
You are better now, but you mustn't get up yet. You must stay in bed for another two days.
本課側重學習的是情態動詞must的用法。
其實，在第61課中已經出現了must的用法，只是在第61課裡側重學習的是must的肯定句的用法，比如第61課中有這麼兩句話：
We must call the doctor.
He has a bad cold, Mrs. Williams, so he must stay in bed for a week.
由此可以看出，must的肯定句的用法為：
sb. must do sth.
到了本課第63課裡，主要學習must的否定句和疑問句的用法，比如本課裡出現的這幾句話：
..., but you mustn't get up yet.
The boy mustn't go to school yet, Mrs. Williams. And he mustn't eat rich food.
- Must he stay in bed? - Yes.
需要注意的是：
must表“必須”時的否定形式並不是mustn't，而是needn't（到了下半冊，還會學習其他否定表達方式）。
needn't表“不必”，而mustn't表“不能；禁止”。
因為must是情態動詞，所以變成一般疑問句時，只要把must提到句首即可，但要注意其否定回答時要用needn't。比如：
- Must he stay in bed?
- Yes, he must.
- No, he needn't.
【注意】
除了情態動詞must以外，在第61和63課裡也出現了情態動詞can的用法。
只是在第61課裡的can表“能；會”，是一種能力。其基本用法是：
sb. can do sth.
如：
He can drive a car.
其否定表達為：
sb. cannot/can't do sth.
如：
He cannot/can't drive a car.
其一般疑問句為：
- Can sb. do sth.?
- Yes, sb. can.
- No, sb. can't.
如：
- Can he drive a car?
- Yes, he can.
- No, he can't.
當然，句子的主語也可以是sth.，如：
The dog can run very fast.
此外，要注意can的否定表達cannot，在書寫上can和not不能分開寫。
在第63課裡的can表“可以”，是一種許可。其用法與can表能力是類似的，其基本用法是：
sb. can do sth.
如：
I can give you some help.
其否定表達為：
sb. cannot/can't do sth.
如：
I cannot/can't give you any help.
其一般疑問句為：
- Can sb. do sth.?
- Yes, sb. can.
- No, sb. can't.
如：
- Can you give me any help?
- Yes, I can.
- No, I can't.
只是，與can表能力時不同的是，當can表允許時，其主語一般都是人。
三、更多拓展
He must remain in bed for another two days.
本課出現了系動詞remain、stay和keep，它們被稱作持續系動詞，主要用來表示狀態的持續。持續系動詞後面可接形容詞、名詞或短語。如：
It remains a mystery (謎團) for a long time.
Keep quiet, please.
You must stay in bed for a week.
有關前面學過的感官系動詞的用法，可參考下面的鏈接：
