閱讀文章中有這樣一句話:“A survey of new stories in 1996 reveals that the anti-science tag has beenattached to many other groups as well, from authorities who advocated the elimination of the last remaining stocks of smallpox virus to Republicans who advocated decreased funding for basic research.”
文章中有這樣一句話:“With as many as 120 varieties in existence, discovering how cancer works is not easy.”
With引導的是一個獨立主格結構,在這個句子中做原因狀語,也就是說“因為現存癌癥的種類有120種之多,所以…”。這句話的主語是由一個復雜的動名詞短語充當的,即discovering how cancer works.由于這句話的狀語較長,主語又是這樣的一個復雜結構,所以大家往往感到找不到這個句子的主干。