They set up a group（ ）（作战）against the destruction of the rainforests.答案是campaigning，为什么用现在分词？而不用过去分词或不定式？

They set up a group（ ）（作战）against the destruction of thrainforests. They set up a group（ ）（作战）against the destruction of the rainforests.答案是campaigning，为什么用现在分词？而不用过去分词或不定式？ The group was set up...为什么不是setted up?被动啊,为什么是set up,set up的词性是什么 The group was set up in 1980(同义句)The group ____ ____ in 1980 They want me to set you up. how a band set up they plan to set up a mounment in memory of the dead men为什么用in They set up a Hope Project School( )the poor children to received edcation. They are going to set up a firm___(make) shoes for poor children. They've set up a( )/fi:ld/(音标）hospital with the latest equipment. they have set up a hope primary school there改为被动语态 商务英语翻译.Producer Co-op:a group of producers set up a business together.They sell their produce to the Co-op and it in turn sells the produce to the public,For example Kerry Co-op,Virginia Co-op.etc. 高手们请帮我分析一下这个句子!Federal research on information technology is seriously inadequate,according to a group of experts set up to advise the US President.Federal research on information technology according to a group 是什么 32.We have already ________.a new group to help the poor people .A put up B set up C taken up 请翻译句子和选项并加以说明原因 set up a goal与set a goal 区别 意思 Many elderly people have to live on money they ____ when they were working.a.laid up b.put back c.set up d.put aside They set up a food bank last year.(改为被动语态)A food bank___ ___ ___by them. In 1976,a year later,they set up a company 逗号说明这句话是1976还是1977