Listen to a few grammar rules, such as “the present continuous tense is used for talking about developing and changing situations”. Learning grammar rules is the stupidest thing you can do. The two main reasons: 1) It is impossible to memorize all those hundreds of grammar rules anyway, 2) When speaking English, you don’t have time to think: “What tense should I use? Let’s see... I want to present the idea of action continuing up to the present time, so I should use the present perfect tense.” You want to use your English naturally. Grammar rules may improve your scores in tests, but they do not improve your English.