二手EV200:语法专家进！

1、 The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases such as the trial of Rosemary West.
此句的seeking是用来修饰newspaper的，by newspaper...这一部分又是来修饰witnesses的。
2、 But specialization was only one of a series of related developments in science affecting the process of communication.
affecting是修饰development的，只不过被in science隔开而已

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1 by doing
2 过去进行时

两句的-ing结构都是定从。先行词分别为payments,developments

-ing结构在这两句中都起修饰作用，分别修饰newspapers和developments.用-ing是因为newspapers和seek,developments和affect是主动关系。如果是被动关系则应该用-ed形式。

xuaifangw的答复是错的，她/他拆成了两个自相矛盾的句子（一句说政府要禁止报纸给证人付钱，一句又说政府试图收买重要案件的证人）

1.“The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases such as the trial of Rosemary West.”分成两个句子为“The government is to ban payments to witnesses by newspapers.The government is seeking to buy up people involved in prominent cases such as the trial of Rosemary West.”即此句中-ing是进行时的标志。
2.句2中，affecting作为后缀，修饰science。