Hi sahar٫ in fact you are asking a general question the thing which leads u to learn English is to study as much as u can ٫no specific way but the part that u can improve your English faster than the others ٫is to ”listening to conversations or different audio "because the vital or the priority of learning English is to understand what the foreigners says.hope it helps

Hi Sahar, it's difficult to say how.everyone has a especial way to learn a language, but some ways are common and popular between learners. Here are are some of them: -Watching movies in English...at first watch the movie with Persian subtitle and then watch it with English sub over and over.it really helps you with listening and speaking. -Reading short stories (consider your level) -Try watching news in English like BBC or VOA. About grammar, I offer you the book "English grammar in use". Don't ignore writing. one of the best advantages on italki is "write a notebook entry".It's really helpful. You just write and wait for native speakers to correct you :) And at the end, there is only one thing that you must remember BE INDUSTRIOUS AND DON'T GIVE UP Hope be helpful :)