ability or possibility
[kæn]
Can
past ability or polite request
[kʊd]
Could
mission or possibility
[meɪ]
May
weak possibility
[maɪt]
Might
necessity or strong certainty
[mʌst]
Must
suggestion or future (formal)
[ʃæl]
Shall
advice or recommendation
[ʃʊd]
Should
future intention or certainty
[wɪl]
Will
polite or conditional
[wʊd]
Would
