Can you help me response?
I can try! Im sorry -- I cant right now. Im sorry -- I have a bad back. (Lets say that want you to help move a heavy item.)
How can I use or how I can use?
0:079:49Can I? Could I? May I? - YouTubeYouTube
How I can is correct?
how i can: Can you show me how I can handle this camera? So, the correct form will be how I can because your question is started with could, so no need to form the second question with how can I in the same sentence.
How I can improve my English?
7 Ways to Quickly Improve Your English Language SkillsWatch movies in English. Immerse yourself in English language news. Start a vocabulary book of useful words. Have conversations in English. Practice, practice, practice. Curiosity doesnt always kill the cat. Dont forget to have fun while you learn.