collect的ing形式

collecting的例句：Her childhood passion for collecting has not dimmed, but now she is more discerning（她孩提时培养起的对收藏的痴迷丝毫未减，现在只是变得更有眼力了）；They are going from door to door collecting money from civilians（他们挨家挨户地向百姓收钱）。