Hay, I had my third English class today where the simple present and past perfect occurred, I mastered a bit. The bad but in every class we have to write a summary in it I'm totally lousy I have problems to formulate reasonable English phrases and to understand them meanwhile I have a 5 in English.
How can I improve my English without foreign travel? I already look at Youtube & Netflix English language series.
Read in English. It's not much fun if you have to look up every third word, but after a while you will have to do it less and less.
Read English books and watch English films / series. I also meet English speaking people more often to talk to them in combination with the above, helped me a lot
I'm good in english, if you want I can try to help you.
How do I learn sentences well? I can't imagine reading books in English only: /
When you read a lot, you have processed so many well-formed sentences that you unconsciously learn how to make them good. Language is very difficult to explain, you just have to use it and learn it.