以下是一些以"doing"作为主语的句子例句：
Doing exercise regularly is important for maintaining good health. （经常锻炼对于保持健康很重要。）
Doing your homework before the deadline is crucial for your academic success. （在截止日期之前完成家庭作业对于你的学术成功至关重要。）
Doing volunteer work in the community can make a positive impact on society. （在社区做义工可以对社会产生积极的影响。）
Doing the dishes is one of my least favorite household chores. （洗碗是我最不喜欢的家务之一。）