我有事找你。

I need to see you about something.

有事要对你说。

I have something I need to talk to you about.

有事没事地往城里跑

often go into town

有事同群众商量

have something to discuss with the people

有事大家商量。

When something happens we can discuss it together.

有事大家一起做。

When there is something to do everyone pitches in.

现在有事

have something on at the moment

他已经有事做了。

He's already got a job.

放心吧，不会有事的。

Don't worry, nothing will happen.

他心里有事。

There's something weighing on his mind.