Keeping a sense of humor helps to reduce stress and promote creative thinking .句型分析

Keeping a sense of humor helps to reduce stress and promote creative thinking .句型分析
请问下面这句话：Keeping a sense of humor helps to reduce stress and promote creative thinking in today's competitive society.1.　句首Keeping是动名词放句首作什么成分?2.　动词helps　是这句话中的谓语动词吗?　如在keeping a sense of humor 连接当中如果放连接词will ,语法上对吗?　BE动词如is 因为一句话只能有一个动词?
改为：Keeping a sense of humor (will) helps to reduce stress and promote creative thinking .