其实这两个词组并没有区别，只是现在在使用的时候，经常省略掉to。例如：I often help my mother(to)clean the house.我经常帮助妈妈打扫屋子。
help do例句
1、Mother cannot get Mary to help do the housework; she always has her nose in a book.
母亲叫不动玛丽帮她做家务，她总是忙着看书。
2、To help you do that, your brain increases your hunger for new experiences ．
为了帮助你做到这一点,你的大脑会增加你对新体验的渴望。
3、Because goals can help you do and experience everything you want in life.
因为目标可以帮助你完成和体验生活中你想要的一切。
4、Playing an instrument or singing can help us do better in school and keep our brain sharpas we get older.
演奏乐器或唱歌有助于提高我们在学校的表现,并随着年龄的增长保持头脑敏锐。
5、TFK's Homework Helper has many useful tools with tips to help you do your homework better.
TFK的家庭作业助手有很多有用的工具和提示,可以帮助你更好地完成家庭作业。