help sb to keep healthy 还是help sb keep healthy?为什么?

help sb to keep healthy 还是help sb keep healthy?为什么? help sb.to do keep sb to do sth keep friendship with sb 还是keep friendship to sb 英语短语搭配make sb._____sth.help sb._____sth. use sb._____sth.keep sb._____sth. help sb.to one's help sb to with sth? leave finger to help sb turn to sb for help Help sb 后能接to吗 help sb.(to)do sth. it can help keep traditions alivehelp后面应该加to do/doing/sb to do,可是为什么这个句子里keep是原型? help sb to do sth和help sb do help sb to do help sb do区别 短语是help sb sth还是help sb to sth help sb to do 还是help sb do help sb.do sth.还是help sb.to do sth. 有keep to do和keep sb. to do吗?