I am not very good at English but I am working on it这是一般的说法不会引起老外的反感
如果一定要如题翻译:I am sorry my English is poor
Forgive me, my poor is English
my poor is English 就可以了
不过建议少说这句话
见谅,我的英语基础很差!
Sorry for my poor English.
sorry,my english is poor
Excuse me for my poor English.