三、 知识点整理
1．while
(1) while并列连词，表示对比或对照 Mr Smith is a play writer while his wife is a famous actress.
⑵while当……的时候，引导时间状语从句 While working in the office, he found a stranger steal in.
⑶while表示让步，“虽然，尽管” While the parents love the children, they are strict with them.
2．Customers see so many ads every day that advertisers must work hard to get their message across.
【so many / much / few / little … that…】
3. Armed with facts and figures, customers are better able to deal with the often powerful arguments given by a salesman or saleswoman. [armed with… 过去分词短语作状语]
