How to improve my English standard?

I am a Form 1 student studying in an EMI school. I have problems in improve my English standard. If you could give me some advice, it will certainly be useful for me. I have problem especially in handling my homework.
Thank you for your kind attention.

[Mister Micawber]

Vicki, these questions of yours are all too general to handle adequately here. There are whole textbooks on each subject you have mentioned in your posts.

The short answer is study and practice. If you have specific questions on points of grammar, vocabulary, pronunciation, or structure, we would be happy to try to answer them.