help sb to do sth，其意为“帮助某人做某事”，help sb doing sth也是正确的表达，它也表示帮助某人做某事，可视为help sb in doing sth省略介词in得来。
help sb to do sth例句
We helped her (to) find her things.我们帮她找东西。
I helped him (to) repair his bike.我帮他修自行车。
Mother helped me (to) do my homework.妈妈帮助我做家庭作业。
Will you help me (to) choose myself a new coat?请你帮我选件新大衣好吗？
Can anyone help me (to) fill in this tax form?有谁能帮我填写税单吗?
When she fell, a friend rushed to help her (to) get up.她摔倒时，一个朋友冲上前把她扶起来。
