固定句型There is no use(need/good/bad...)+(in) doing sth这里 in省略了
动名词可在 there be 句型中做主语(不能用不定式),常见形式为 “there is no + 动名词”或 “there is no / any + 名词 + 动名词”.It is no use(need/good/bad...)+doing/to do 表语是(of)no use,not any use,not the slightest use,no good, not much good,fun等时,常用动名词(不用不定式)做主语并后置,用 it 做形式主语.