Used to express ability, possibility, permission, and requests
Could
Used to talk about general abilities in the past
May
Used to express possibility and ability
Used when asking for or giving permission
Might
Used to express possibility and ability
Used when asking for or giving permission
modal verbs
are auxiliary or helping verbs that modify or change the meaning of the main verbs.
Might
Similar to 'May' in that it is used to express the possibility or likelihood of something happening, but suggests a lower degree of probability or a less likely possibility
Will and Would
Mainly used to talk about willingness and hypothetical situations
Will
Used to talk about the future; used to predict something about the future or express expectations
Would
Past tense of 'will'
Shall and Should
Used to express various degrees of obligation or necessity, as well as suggestions, advice, and expectations
Shall
Used to express a specific obligation or requirement; the modal 'shall' is used with 'I', 'We', and 'You' to express a future action
Should
Typically used to express a recommendation, suggestion, or advice