It's no good waiting for something to turn up.

It's no good waiting for something to turn up.
It's no good waiting for something to turn up.

It's no good waiting for something to turn up.
守株待兔是没用的
1.It is no good/use doing sth 是个固定句型,习惯上只用v-ing 形式做主语
2.wait for sb to do sth 等着某人干什么
3.turn up 现身,露面