It's no good / use + Verb-ING 例句：
It's no good / use looking for it here. You lost it 2 weeks ago.
It's no good / use asking her for help. She will never care.
It's no good / use talking to him. He won't listen.
It's pointless / useless / hopeless / a waste of time + Verb-ING
例句：
It's pointless repairing that car. It's time for a new car.
It's useless crying. You'd better figure out the solutions.
It's just a waste of time contacting Jane. She's lost her phone.
There's no use / point + Verb-ING
例句：
There's no use / point writing to her. She will not reply.
There's no use / point advising her. She's such a stubborn girl.
There's no use / point shouting here. No one will listen.
