YOU SAID:
i went to the park it was nice because it was raining
INTO JAPANESE
雨が降っていたので公園に行ってよかった
BACK INTO ENGLISH
It was raining, so I'm glad I went to the park
INTO JAPANESE
雨が降っていたので、公園に行ってよかったです
BACK INTO ENGLISH
It was raining, so I'm glad I went to the park
You've done this before, haven't you.