How do I memorize content so I don't forget it after a few days?

are you just rereading the same content or are you actually testing yourself? because that's the secret right there! it's all about interleaving, man - mixing different English topics in your study sessions instead of just grinding through one thing, and most importantly doing quizzes, flashcards, speaking out loud, writing sentences. your memory only sticks when you force it to retrieve that stuff, not when you're just reading! and study spaced out - the next day, 3 days later, a week later - because that way you're fighting forgetting at the right moment, not letting weeks go by and trying to cram it all back in. it's annoying at first but it's like... it changes everything!

Spaced repetition is what really sticks in your memory - you need to review the content at increasing intervals (one day later, three days later, a week later) instead of cramming everything at once. What a lot of people don't do is write down the things you forgot during those reviews, because that forces your brain to work harder and lock it in better. Try using a flashcard app with a spaced repetition algorithm (like Anki) - while you study on your own, the tool automates those intervals for you, and in the end you spend less time and retain way more.

But there's a detail people let slip by: it needs to be *hard* enough to force you to think. If you just reread stuff or do exercises you could do with your eyes closed, your brain doesn't lock anything in. Try this: after learning something new, wait a day or two and come back to teach it to someone else (or even write a paragraph explaining it like you're talking to a friend who doesn't know). When you can't remember or you get confused, that's when learning actually sticks. It's annoying, it's uncomfortable in the moment, but that's exactly what gets lodged in your long-term memory.