YOU SAID:
He laughed at me when I told him that I wanted to be an astronaut when I grow up.
INTO JAPANESE
私が大きくなったら宇宙飛行士になりたいと言ったとき、彼は私を笑った。
BACK INTO ENGLISH
He laughed at me when he said he wanted to be an astronaut when I grew up.
INTO JAPANESE
私が育ったときに宇宙飛行士になりたいと言ったとき、彼は私を笑った。
BACK INTO ENGLISH
He laughed at me when he said he wanted to be an astronaut when I grew up.
That didn't even make that much sense in English.