hi! can is a modal auxiliary.you can used this word when you asked humble request to someone.this verb past tense is could.(can - be able or allowed to) ex: - can you play cricket? -can i help you? -could you please repeat that word? -I could not walk yesterday . do - did does doing and done. do is a verb sometime this verb used auxiliary verb.usages of this verb when you can possible ending or work on. (make or provide) ex: -do you have any brother? -where do you work? -did u eat? finally, "you can do it"

ya..very well.i am in tamilnadu (south indian)and you?