1 1Driven by a greater demand for green products放句首是过去分词作状语,只强调the food company 与drive 的被动关系
2Being protected by the wall,在句中也做状语,与主语是被动关系,但同时也包含被动的动作正在进行,但bing done 这种结构不常用作状语,一般都用done.
1 1Driven by a greater demand for green products放句首是过去分词作状语,只强调the food company 与drive 的被动关系
2Being protected by the wall,在句中也做状语,与主语是被动关系,但同时也包含被动的动作正在进行,但bing done 这种结构不常用作状语,一般都用done.