- PuzzleMeLv 41 decade agoFavorite Answer
Can ( 100% ):
You use it to ask someone's ability of doing something. Do not use it for asking for permissions.
ex. Can you type?
May ( 50% ) :
Please use this to ask for permission.
ex. May you type this page for me?
Must ( 100% ):
It means "have to" but its tone and emphasis are stronger than "have to"
ex. I have to go home. ( I want to go home, but if I didn't go home, my parents may or may not ground me. )
ex. I must go home. ( I may or may not want to go home, but if I didn't go home now, my parents would ground me for sure. )
Shall ( 80% - 100% ) :
It means "will", as the future tense usage of "should".
When you make a suggestion to do something in the future, either "near future" or a "far far far away future".
ex. Shall we dance? ( it suggests that we should dance and we will dance together. )
It is usually used to compare with "should"
Should ( 50%):
It means "maybe"
ex. Should we dance? ( maybe it is a good idea that we dance or maybe it is not. It is really up to you. )