YOU SAID:

so I went down to this park and it was really fine :D

INTO JAPANESE

だから私はこの公園に行きました、それは本当に良かったです：D

BACK INTO ENGLISH

So I went to this park, it was really good: D

INTO JAPANESE

だから私はこの公園に行った、それは本当に良かった：D

BACK INTO ENGLISH

So I went to this park and it was really good: D

INTO JAPANESE

だから私はこの公園に行きました、それは本当に良かったです：D

BACK INTO ENGLISH

So I went to this park, it was really good: D

INTO JAPANESE

だから私はこの公園に行った、それは本当に良かった：D

BACK INTO ENGLISH

So I went to this park and it was really good: D