Here are some good ways to improve English grammar and writing abilities for a non-native speaker:

1. Immerse yourself in the language. One of the best ways to improve your English is to surround yourself with it as much as possible. This means watching English-language TV shows and movies, listening to English music, and reading English books and articles. You can also try to find opportunities to speak English with native speakers.
2. Take a grammar course. If you’re struggling with English grammar, taking a course can be a great way to learn the basics. There are many grammar courses available online and in libraries.
3. Practice writing regularly. The more you write, the better you’ll become at it. Try to set aside some time each day to write, even if it’s just for a few minutes. You can write about anything you want, such as your thoughts, feelings, or experiences.
4. Get feedback on your writing. Once you’ve written something, ask a native speaker to read it and give you feedback. They can help you identify any grammar or spelling errors, and they can also offer suggestions for how to improve your writing style.
5. Don’t be afraid to make mistakes. Everyone makes mistakes when they’re learning a new language. The important thing is to keep practicing and learning from your mistakes.

Improving your English grammar and writing abilities takes time and effort, but it’s definitely possible. By following these tips, you can make significant progress in your English language skills.

Here are some additional tips that may be helpful:

• Use a grammar checker. There are many grammar checkers available online and as software programs. These tools can help you identify and correct grammar errors.
• Read books and articles written by native speakers. This will help you get a feel for the correct grammar and usage of English.
• Watch English-language TV shows and movies. This will help you become familiar with the way English is spoken in everyday life.
• Listen to English music. This is a great way to improve your listening comprehension skills.
• Talk to native speakers as often as possible. This is the best way to practice your speaking skills and get feedback on your grammar and pronunciation.

With hard work and dedication, you can improve your English grammar and writing abilities.