书名：新多益文法考前冲刺
页数：P.95
题目：Our company increased its sales figures by developing new projects.
^^^^^^^^^^^
页数:P.114
题目: The phone lines at Philips electronics are staffed by dedicated
^^^^^^^^^^
employees with a wide knowledge of the company's prouduct.
疑问： 为什么上面是用动名词 下面却是用过去分词
上面不能用过去分词吗? 或是下面那题不能用动名词吗?
其实我动名词与现在分词有什么不同 也分不太清楚
麻烦帮忙解答了 谢谢!