表举例子和陈述背景的用法：
　　For example/ instance…
　　Take … for example/ instance.
　　To offer another example/ instance…
　　In my personal case,…
　　Just as the saying goes: there is no garden without weeds. The same appliesto TV advertising.
　　As the society has entered the information age and the commercialization/ industrialization is sweeping across the world ,…
　　The advent of … makes…
　　Great changes have taken place in family life along with the development of the society.
　　As time passes…
　　Compared with the past,…
　　However, the situation is beyond control since…
　　In the past, it was assumed that…. But now the attitude is that…