To learn English well to listen, speak, read, write-only, you can understand the meaning of the English language, such as English-English Dictionary open, etc.
To learn English as well as reading and writing, they can understand the meaning of spoken English, such as opening a dictionary. England - English, etc.
To learn English, both listening, speaking, reading and writing, can understand the meaning of the English language, such as the dictionary, English - English. And so on.