英语语法知识求助，跪谢~~~~~

Question

1，After determining the target audience for a product or service, advertising agencies must select the appropriate media for the advertisement.这句话中的“After determining the target audience for a product or service”怎么翻译和分析句子？
2， First, narrowcasting means that television channels are seen by an increasingly narrow segment of the audience.中的“an increasingly narrow segment ”不会理解和分析？
3， Fourth, control over programming is being passed from the networks to local cable operators and satellite programmers.这句话也不会分析句子成分？
4，After television, the medium attracting the next largest annual ad revenue is newspapers. The New York Times, which reaches a national audience, accounts for $1 billion in ad revenue annually. 中的“attracting the next largest annual ad revenue ”也不会理解和分析？
5，A final advertising medium is direct mail, which uses mailings to consumers to communicate a client’s message. 中的“A final advertising medium is direct mail”不会理解和分析？
嘿嘿，麻烦了，快考四级啊。着急了~~~

Answer 1

1. 分词做状语 逻辑主语是主句的主语 在这句话里是advertising agencies 翻译的话就是 广告商在确定产品和服务的目标市场后。。。。
2.an increasingly narrow segment 应该是指 一个小部分增长的观众
3.Fourth, control over programming（主语） is being passed from（谓语 被动语态的现在进行时态） the networks to local cable operators and satellite programmers（宾语） from 。。to 固定搭配从。。到。。
4.attracting the next largest annual ad revenue 这个是做medium的修饰成分 分词修饰 意思是第二个可以吸引广告收入的媒体是。。。、
5.A final advertising medium is direct mail这个就是主句 很完整的一句话 后面是非限制定从句