7、可在其前面加上连词when,if,once,though,unless等,以便明确作何种状语。①表时间,相当于一个时间状语从句,有时过去分词前可加连词when或while来强调时间概念。从山顶上看,这个城市就像一个大花园。______________________________, the city looked like a big garden.Seen from the top of the hill入党以后,他决定献身于党的事业。__________________________,he decided to devote his life to th