YOU SAID:

this watermelon has been around since i got here in march but it was so hot

INTO JAPANESE

このスイカは、私が3月にここに来てからずっとありましたが、とても暑かったです

BACK INTO ENGLISH

This watermelon has been here since I came here in March and it was very hot.

INTO JAPANESE

このスイカは私が3月にここに来てからずっとここにあり、とても暑かった.

BACK INTO ENGLISH

This watermelon has been here since I came here in March, and it was very hot.

INTO JAPANESE

このスイカは、私が3月にここに来てからずっとここにあり、とても暑かった.

BACK INTO ENGLISH

This watermelon has been here since I came here in March, and it was very hot.