1.Where do you think you are?你认为你现在是在哪儿?

do you think 是用在特殊疑问句中的插入语，用来征询见解或表达看法。因为句中插入语已经是疑问式，主谓倒装了，所以youare的位置不能再对调了。插入语一般是对句子加一些附加的解释，在句子中作独立成分。常用来作插入语的结构有I hope, I think, I'm afraid,you know等。插入语可以位于句尾或句中，有时也可出现在疑问句中。

2.must have been doing sth.,一定/准是在做某事。

这种结构用来表示对过去正进行的事情的推测。下文中的can't have been是 can't have beendriving的省略式，在意思上与must have been driving正相反。

3.That's why I didn't see the sign.所以我才没看见那牌子。

why I didn't see the sign作is的表语从句，以why引导的从句用来解释事情的原因。

4.…you'd better take my advice!……你最好还是听从我的劝告吧!

take one's advice是“听从劝告”的意思。

新概念英语第一册129-130课语法知识点 Grammar in use

表示猜测和推断的情态助动词must和can't(2)

must与can't不仅能表达对现在和将来的猜测和推断，而且能表达对过去的猜测和推断——这时可用 must havebeen表示肯定的推断，用can't have been(而不是mustn't havebeen)来表示否定的推断，如后面跟进行时则表示对过去正在进行的动作的猜测。请看例句：

You must have been driving at seventy miles an hour.

你当时肯定正以每小时70英里的速度行驶。

I didn't see it. I must have been dreaming.

我没看见。我当时一定是在胡思乱想吧。

She can't have been 29.She must have been 36.

她那时肯定不会是29岁，她一定36岁了。

He can't have been reading. He must have been sleeping.

他那时肯定不是在看书，他准是在睡觉。

新概念英语第一册129-130课重点单词详解 Word study

1.charge v.

(1)罚款;使承受经济负担：

He was charged by the policeman for speeding.

他因开车超速而被警察罚款。

(2)要(价);收(费)：

The hotel charged them ￡ 900 for one night.

饭店向他们索要900英镑作为住一晚的费用。

(3)指控;指责：

They charged him with murder.

他们指控他犯了谋杀罪。

2.dream v.

(1)做梦;梦见：

He dreamt about his grandmother last night.

他昨天夜里梦见他的祖母了。

Do you often dream at night?

你晚上经常做梦吗?

(2)梦想;幻想：

She dreamed that one day she would be as free as a bird

她幻想着有一天自己能像鸟儿那般自由。

I once dreamed of becoming a famous doctor.新概念英语听力

我曾一度梦想着成为一位著名的医生。

(3)出神;心不在焉;空想：

Don't dream away your life!

不要在想入非非中虚度你的人生。

Sorry, I didn't see the sign. I must have been dream ing.

对不起，我没看见那牌子。我一定是思想开小差了。

3.wave v.

(1)招手;挥手示意：

He waved us quiet.

他挥手要我们别出声。

She waved me goodbye.

她向我挥手告别。

(2)起伏;飘动：

The flag is waving in the wind.

旗帜正在风中飘扬。

She was attracted by the waving sea.

她被那汹涌起伏的大海吸引。

新概念英语第一册130课课后练习答案 Key to written exercises

A

1 He didn't come to work yesterday. He must have been ill.

2 He didn't come to the office this morning. He had to stay at home.

3 I don't think she was Austrian. She must have been German.

4 I lost my pen so I had to buy a new one.

5 He forgot his case so he had to return home.

6 She didn't hear the phone. She must have been sleeping.

B

1 I don't think they were. They can't have been Canadian.

They must have been Australian.

2 I don't think she was. She can't have been Finnish.

She must have been Russian.

3 I don't think they were. They can't have been Japanese.

They must have been Chinese.

4 I don't think they were. They can't have been butchers.

They must have been bakers.

5 I don't think she was. She can't have been a dentist.

She must have been a doctor.

6 I don't think he was. He can't have been a sales rep.

He must have been the boss.

7 I don't think she was. She can't have been seventeen.

She must have been twenty-one.

8 I don't think they were. They can't have been five.

They must have been seven.

9 I don't think he was. He can't have been seventy-six.

He must have been over eighty.

10 I don't think she was. She can't have been fifty-five.

She must have been under fifty.

11 I don't think it was. It can't have been the 17th yesterday.

It must have been the 16th yesterday.

12 I don't think it was. It can't have been Tuesday yesterday.

It must have been Wednesday yesterday.

13 I don't think it was. It can't have been the 19th yesterday.

It must have been the 20th yesterday.

14 I don't think it was. It can't have been cheap.

It must have been expensive.

15 I don't think it was. It can't have been easy.

It must have been difficult.

16 I don't think she was. She can't have been old.

She must have been young.

17 I don't think he was. He can't have been ill.

He must have been tired.

18 I don't think they were. They can't have been listening to theradio.

They must have been watching television.

19 I don't think she was. She can't have been retiring.

She must have been looking for a new job.

20 I don't think they were. They can't have been sitting.

They must have been standing.