《新概念英语自学导读第一册》是《新概念英语》系列的一套辅助教材。文章对《新概念英语》中的语法，词汇和长句难句都做了详细的剖析和阐述，从而更好的帮助同学们学习和吸收。下面就一起来学习下吧！
课文详注 Further notes on the text
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you are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 been driving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。
语法 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 have been表示肯定的推断，用can't have been（而不是mustn't have been）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：
词汇学习 Word study
1.charge v.
（1）罚款；使承受经济负担：
（2）要（价）；收（费）：
（3）指控；指责：
2．dream v.
（1）做梦；梦见：
（2）梦想；幻想：
（3）出神；心不在焉；空想：
3．wave v.
（1）招手；挥手示意：
（2）起伏；飘动：
练习答案 Key to written exercises
Lesson 130
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 the radio.
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.
