“我想说 我是1989年出生的 还是 我出生在1989年?那个对的?” Well, both are right. but the first one is more common. we usually say the birth place after the phrase "我出生在wo chusheng zai' so you better say "我出生在英国 wo chusheng zai yingguo " and often say the birth date with the expression "我是。。。出生的wo3 shi4 。。。。chu1sheng1de" so you can say "我是1989年出生的"