An experience about my English

At first, I've learned English to pre-intermediate level at high school. After high school I never needed English for anything. Later Also in university, then in business life I never needed to use English. It was nearly ten years. But I've always felt my I have a deficiency in English. Whatever...

A few weeks ago I decided to improve my English and started an English course. The first day of the course was very surprising for me. Because I've been still at the same level, pre-intermediate. I've been was able to understand all the talks, reading and writing activities in lessons. Also my pronunciation has been is still with me although I have very bad speaking fluency. And I've been I was / I am better than the other students. I was really amazed. I thought about that for a time. Then I realized the situation. I've been watching English movies with subtitles for years. Watching English movies has allowed me to stay at the same level. I'm really happy for that.. :)

You seem far beyond 'pre-intermediate' to me. I think you are just polishing the edges and using more natural 'native' like sentences. My corrections are not perfect. I hope someone will give you some better feedback. Good luck.