Our earth is in danger so taking action to protect it is important为什么要用taking
问题描述：
Our earth is in danger so taking action to protect it is important为什么要用taking
急
答
动名词短语作主语呀那老师讲的时候为什么要画下
is important意思是后面已有动词 is ， 故前面用动名词作主语。