Should in the modern sense means “ought” or that you would do something, but are unable to. I should clean my room but I can’t care less. What should I do? ” The archaic sense, as in owing an obligation, has mostly been replaced with the singular simple are. shall.

When paired with an infinitive, the phrase “supposed to,” suggests an obligation or an intended purpose. What does a clean room look like? So

in modern usage, “supposed to” suggests owing an obligation as opposed to “should”, which, in itself has become a suggestion.

Should in the modern sense means “ought” or that you would do something, but are unable to. I should clean my room but I can’t care less. What should I do? ” The archaic sense, as in owing an obligation, has mostly been replaced with the singular simple are. shall.

When paired with an infinitive, the phrase “supposed to,” suggests an obligation or an intended purpose. What does a clean room look like? So

in modern usage, “supposed to” suggests owing an obligation as opposed to “should”, which, in itself has become a suggestion.