YOU SAID:
Watermelon and I will be there at the same time
INTO JAPANESE
スイカと私は同時にそこにいます
BACK INTO ENGLISH
Watermelon and I are there at the same time
INTO JAPANESE
スイカと私は同時にそこにいる
BACK INTO ENGLISH
Watermelon and I are at the same time
INTO JAPANESE
スイカと私は同時にいる
BACK INTO ENGLISH
Watermelon and I are at the same time
That didn't even make that much sense in English.