Period 10附 件

I 课文注释与疑难解析

1. By the year 2030, development in biochemistry and medical science will have made it theoretically possible for us to live for at least 150 years. 到2030年，生化及医疗科学的发展将已经使我们至少能活150岁在理论上成为可能。

1）句中的it 为made的形式宾语，真正的宾语是for us to live for at least 150 years。除make 外，下列动词也常跟形式宾语it：feel, find, think...

　　e.g I feel it our duty to defend our country.

　　 He thinks it right for her to go there.

　　 We find it interesting to watch the game.

2) 我们也可以这样理解后半句：It is theoretically possible for us to live for at least 150 years.

注意likely, possible和 probable它们各自的用法。

　　likely一般用于以下句型中：

　　Sb / Sth is likely to... It is likely that sb / sth...

possible一般用于以下句型中：

It is possible that sb / sth... It is possible (for sb) to do...

probable一般用于以下句型中：

It is probable that sb / sth...

e.g. He is likely to come here tomorrow.

It is likely / possible / probable that he will come here tomorrow.

It is possible for him to come here tomorrow.

2. By the middle of the century, computers that are millions of times smarter than us will have been developed. 到本世纪中叶，比我们灵巧好几百万倍的电脑将已经被研制出。

句中的定语从句that are millions of times smarter than us 是一个表示倍数关系的句型。当我们表达A是B的多少倍时，常用以下三个句型：

A is倍数 + as 原级 + as B.

A is倍数 + 比较级 + than B.