help sb. doing or do sth.

help sb to do or do sth

另外还有：

help sb with sth

help sb in doing sth

：）

如中间没有to: help sb. doing sth.
I help him buying food.
I help him to buy food.
I help him passing the paper.
I help him to pass the paper.

help sb do sth 固定搭配 跟动词原形的.楼上误解.