课文详注 Further notes on the text
1．Can't you come in and have tea now, Peter? 彼得，你现在能进来喝茶吗？
这是否定疑问句，表示邀请。请参见 Lessons 77～78语法部分。
2．Don't you remember? 你不记得了吗？
3．don't need to= needn't。
表示“不必”，是 must和 have to的一般现在时否定式。
4． a pleasant surprise 意想不到的好事，令人惊喜的事。
语法学习 Grammar in use
must, have to 和 needn't
这3个词都表示必要性。在前面已对 must和 have to介绍过。
must是情态助动词，而have to是普通动词，二者在肯定句中一般可以互换，表示不可逃避的义务或责任。must更带有说话人的主观色彩，而have to则更强调客观要求和外界影响。
I shall have to leave London tomorrow.
I had to stop smoking because it was forbidden in my company.
如果我们用 must来提问，则只能用needn't来表达否定的回答。 needn't 还可以理解为have to的否定回答。needn't (don't need to)和 don't have to都表示不必要；而 mustn't却表示绝对禁止，在说话人看来根本没有选择余地。请看例句：
You mustn't turn left.
词汇学习 Word study
1. mean v.
It's raining! That means you don't need to water the garden.
What does "perfume" mean in English?
The green light means "Go on".
What I mean is that we'll have to go back and look for it.
He didn't mean to hurt you.
2. water v.
The garden is very dry, I'm going to water it tomorrow morning.
Tim is watering his lovely little dog.
He felt sad and his eyes watered a little.
Ice cream always makes his mouth water.
Someone had been watering the milk.
He always waters drinks and sells them to tourists.
练习答案 Key to written exercises
1 Does she have to decide immediately?
She doesn't have to decide immediately.
2 Must she decide immediately?
She needn't decide immediately.
3 Do we have to take a taxi?
We don't have to take a taxi.
4 Must we take a taxi?
We needn't take a taxi.
1 I have to telephone him, too.
2 Mary has to wait for him, too.
3 Jim has to meet her ,too.
4 Tom and Mary have to travel by ship, too.
1 Do you really have to telephone him?
2 Does Mary really have to wait for him?
3 Does Jim really have to meet her?
4 Do Tom and Mary really have to travel by ship?