Use Would you like…? for a polite offer or suggestion. Use I can… to offer practical help. Accept or decline clearly and politely.
Practical examples
Would you like some water?
هل ترغب في بعض الماء؟
I can carry that bag for you.
يمكنني حمل تلك الحقيبة عنك.
Thank you, but I can manage.
شكرًا، لكن يمكنني تدبر الأمر.