动名词的用法及功能与名词类同，所以动名词可以在句子中作主语，那么谓语动词的用复数还是单数呢？动名词作主语，谓语动词不是纯粹的用单数或是复数，要根据具体的情况来判断。
一、一般情况下用单数，例如：
Exercising keeps you healthy.
运动使你保持健康。
Cooking costs less than eating out.
做饭比出去吃饭便宜。
Shopping is an expensive hobby.
购物是一种昂贵的爱好。
Computing saves a lot of time.
计算节省了很多时间。
Studying online is very convenient.
网上学习很方便。
Working from home allows a person to work in comfort.
在家工作使人能够舒适地工作。
当单一动名词短语中含有复数名词时，谓语动词用单数，例如：
Jumping from walls is dangerous.
从墙上跳下去很危险。
Cooking meals at home is cheaper than eating out.
在家做饭比在外面吃饭便宜。
Reading books is a good way to improve your English.
读书是提高英语水平的好方法。
Using online practices helps students who don't have books.
使用在线实践帮助那些没有书的学生。
二、当涉及到两个动名词对象时，谓语动词才用复数，例如：
Reading books in English and talking with native speakers are good ways to practice.
读英语书和与以英语为母语的人交谈是练习英语的好方法。
Jogging and biking give your heart a good workout.
慢跑和骑自行车可以锻炼你的心脏。
Taking tests and giving presentations stress many people out.
参加测试和做报告会让很多人感到压力。
三、习题测试
Taking photographs (help) _________ us remember our vacations.
拍照帮助我们记住我们的假期。
Wearing suits (be) _________ less comfortable than wearing jeans.
穿西装不如穿牛仔裤舒服。
Babysitting young children and taking care of puppies (require) _________ a lot of energy and patience.
照顾小孩和照顾小狗需要很多精力和耐心。
Riding the bus during rush hour (be) _________ crowded.
在高峰时间乘公共汽车很拥挤。
Traveling and having international friends (open) _________ your mind.
旅行和交国际朋友拓宽你的思维。
答案：helps，is，require，is，open.