help in
帮助干…, 在…方面帮助
They often help in the farm work in our village.
他们常常帮助我们村干农活
help with
帮助(某人)做…
He's helping with odd jobs.
他在帮着干杂活.
用…来帮助
The government helped with materials and money.
政府帮助提供材料和资金.