英文.....may / migt / could

could 通常係可以做但係冇做, 因為已經過去左, 例如i could do it myself, 即係我本來可以自己做.

如果係問題好似"could you do that for me?" 係有禮貌, 遠比"can you do that for me"有禮

may i have something 同 can i have something差唔多, 不過有禮貌d
老一輩既人會話may i... 係問人地既permission, can i... 係能力上做唔做得到

may 同 might係差唔多, 好似it may rain tomorrow或者 it might rain tomorrow, 兩者都係可能會落雨, 不過might既可能性通常比may低.

MAY姐係可以
E.G. i may have a dime(美國既一毫) when i finish my work.
might=may既過去式...好似may咁.
could=can既過去式.
e.g. i could do this when i have someone support me.