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.