I like my sister.I'm good for her.改错：
网友回答
I'm good with her.
be good with,意思是：和某人相处得好
比如：I am very good with people.
我和人们相处得很好.
======以下答案可供参考======
供参考答案1:
for 改成 with
供参考答案2:
应该是I'm good to her.-因为喜欢所以我对她很好。 for her就变成了--我对她很合适。
供参考答案3:
I like my sister.I'm very kind to her.
或者I like my sister.I'm good at her.
应该是这样。
好好学习！~笑~~
供参考答案4:
I'm good for her
改成：I'm friendly to her