翻译为：I am not good at English.
解析：“be good at”意思是“擅长于……”，后面跟名词、代词或动词ing形式。be随着人称和时态的变化而变化，如：?
1、He is good at English. 他擅长英语。?
2、She is good at singing. 她擅长唱歌。
3、They are good at playing basketball. 他们擅长打篮球。
4、Jim was good at drawing when he was ten years old. 吉姆十岁时擅长画画。?
5、Lily's favourite subject is maths and she is good at it. 李利最喜欢的科目是数学，她很擅长它。
扩展资料：
be good 后接不同的介词，表达的意思也不同。?
1、be good with意为“灵巧的；与……相处得好”。?
例如：
She is good with her hands. 她手很巧。
He is very good with the children. 他与这些孩子处得很好。
2、be good to意为“对……友好”。?
例如：My friend was good to me when i was ill. 我生病时我的朋友对我关怀备至。
3、be good for意为 “对……有好处”。
例如：Eating more vegetables is good for your health. 多吃蔬菜对你的健康有好处。