There are several learning methods that can be effective for studying English as a subject:

Vocabulary building: One effective way to learn English is by building your vocabulary. This can be done through activities such as flashcard memorization, word lists, and word games.

Reading comprehension: Reading comprehension exercises can help you to understand the grammar and vocabulary of the language, as well as improving your overall reading skills.

Listening practice: Listening practice is essential for developing listening and comprehension skills, and can be done through audio materials such as podcasts, songs, and news broadcasts.

Writing practice: Writing in English can help to build grammar and vocabulary skills, as well as improving your overall writing ability. This can be done through journaling, writing essays, or other writing exercises.

Grammar study: Grammar study is a key aspect of learning English, and can be done through textbooks, grammar exercises, and grammar-focused activities.

Conversation practice: Conversing in English is a great way to improve speaking and listening skills, as well as building confidence. This can be done through language exchange programs, conversation groups, or one-on-one conversations with a tutor or native speaker.

It's important to find a learning method that works best for you, and to practice regularly in order to improve your skills. A combination of different methods, such as vocabulary building and conversation practice, can also be effective.