过去分词(短语) 做定语：表示与被修饰词之间是 被动关系，且动作已完成。 be connected with 与…连接
e.g. It is surprising that there were 300 gold coins buried underground ____________________. = which were buried underground. 真是令人惊奇, 地下埋了300枚金币。 watching There are so many people _________ the big fire in the street _______________________________. = who are watching the big fire in the street. 大街上有那么多人在观看这场火灾。 people和watching是主动关系。watching是现在分 词作定语表主动，来修饰people，相当于定语从句。
Analysis of the sentences：
1. In the last thirty years, the Internet has grown rapidly. 在过去三十年里，因特网以惊人的速度发展着。 常和现在完成时连用的词语还有lately, recently, in the past+时间段,since then, up to now, so far等 1)In the last thirty years, many predictions have come true . (实现了) 2)Since then they have focused on their handwriting. 从那时起他们就把注意力集中在书写上。
12. 在现实情形中 14. 在虚拟世界里
