《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．I thought so. 我也这样想。
so 是代词，意为“这样”、“如此”。 I think so的否定式为I don't think so（我不这样认为）。类似用so的短句如：
2．have another look 再（仔细）看一眼
3． look old 看上去老
这里look是系动词，后跟表语。
4．at least 至少
5．I'm sure she is. 我肯定她有40岁了。
其后省略了 at least forty。
6．not more than twenty-nine myself. 我自己还没29岁。
其中not more than是“不超过”、“不到”的意思。这里反身代词myself是I的同位语，用来加强语气。
She did it herself. 这事是她自己做的。
语法 Grammar in use
表示猜测和推断的情态助动词must和can't（1）
表示最有力的推论的最常用的形式是must和can't。这时，它们一般与系动词be连用。肯定的推断用 must be来表示，否定的推断用 can't be来表示，而不用mustn't。请看例句：
词汇学习 Word study
1．famous adj.
（1）著名的；出名的：
（2）<口>第一流的；极好的：
2．at least
（1）至少：
（2）反正；无论如何；不管怎样：
练习答案 Key to written exercises
Lesson 128
A
1 He has to be here at six o'clock.
2 I think he is probably busy.
3 He has to be at the office early tomorrow.
4 I think he is probably sleeping.
5 I think he is probably French.
6 He has to be in France next week.
7 I think he is probably an engineer.
B
1 I don't think so. She can't be Italian.
She must be Greek.
2 I don't think so. He can't be English.
He must be American.
3 I don't think so. They can't be Canadian.
They must be Australian.
4 I don't think so. He can't be a mechanic.
He must be an engineer.
5 I don't think so. He can't be a bus conductor.
He must be a bus driver.
6 I don't think so. He can't be a sales rep.
He must be the boss.
7 I don't think so. He can't be twenty-four.
He must be thirty.
8 I don't think so. They can't be five.
They must be seven.
9 I don't think so. He can't be seventy-six.
He must be over eighty.
10 I don't think so. She can't be fifty-five.
She must be under fifty.
11 I don't think so. It can't be the 21st today.
It must be the 20th.
12 I don't think so. It can't be Tuesday today.
It must be Wednesday.
13 I don't think so. It can't be the 2nd today.
It must be the 3rd.
14 I don't think so. It can't be cheap.
It must be expensive.
15 I don't think so. It can't be easy.
It must be difficult.
16 I don't think so. She can't be old.
She must be young.
17 I don't think so. They can't be early.
They must be late.
18 I don't think so. He can't be reading.
He must be sleeping.
19 I don't think so. They can't be listening to the radio.
They must be watching television.
20 I don't think so. She can't be retiring.
She must be looking for a new job.
