tell English very good

应该是speak English very well或者speak very good English
这里修饰speak应该用一个副词,所以用well
而如果用good的话则必须修饰名词,即English
speak后边一般加语言
tell后边一般加说话的内容或者对象
talk一般是不及物动词,一般用法是talk with/to sb about sth
say后便一般加说话的内容