It had been raining and the street was still wet.

　　天一直在下雨，街道仍然很濕。

　　If it had been raining, I could have stayed inside.

　　如果一直下雨，我可能就待在家里了。

　　If it had been raining yesterday, I would not have come here.

　　如果昨天還在下雨的話，我就不會到這里來。