is no use|was no use

试图和他讲道理没用；他从不听。

Trying to reason with him ___is ___no ___use; he never listens.

我们呼救，但没用，因为周围没人。

We called for help, but it ___was ___no ___use as no one was around.

跟他说话没用——他就是不听。

It ___was ___no ___use talking to him - he just wouldn't listen.

在那家酒吧里试图抽烟是没用的。

It ___was ___no ___use trying to smoke cigarettes in that pub.

担心你无法改变的事情是没用的。

It ___is ___no ___use worrying about things you cannot change.