2. Preview the following structures

　1) compare A to/with /and B, compare A to B ,compared with/to..., compare notes

　2) provide sb with sth./provide sth for sb

offer sth to sb/offer sb sth /offer to do sth

supply sb wih sth /supply sth to sb

Language points

1．calculator n. 计算器

calculate vt.& vi.计算；考虑；计划

例句He's calculated that it would take him two years to save up enough money for a car.

他估计要花两年才能存够钱买车。

搭配calculate on/upon sth.指望或依靠某事物

be calculated to do sth.打算或故意做某事

be calculated for 适合于......

运用和完成句子

(1)他仔细地计算开支。

He ________________ very carefully.

(2)我们不能总是指望别人的帮助。

We cannot always____________________.

2. common 常见的；寻常的；普通的；非特异的；共同的；公共的

 常用短语：

 in common 共有，共用

e. g. In common with many movies stars, he thinks that the most important thing is physical health and mental health. 与许多电影明星一样，他认为最重要的事情是身心健康。

 have something ( nothing / little/a lot ) in common with ...和......有（没有/许多）共同点

 in common with ...和......一起；象......一样

 common sense 常理；情理

 common interests 公共利益

common knowledge 普通知识