他来得正好。

He's arrived right on time.

这件大衣我穿正好。

This overcoat is a perfect fit for me.

我正好要找你。

I was just looking for you.

要过两小时才开船呢，我们正好上岸游览一番。

The boat doesn't depart for another two hours, we may as well disembark and see some sights.

既然他来了，正好当面问他。

Seeing as he has arrived, we may as well ask him face to face.