Obsolete spelling of should

simple past tense and past participle of should

Used to issue an instruction (traditionally seen as carrying less force of authority than alternatives such as 'shall' or 'must').

Something that ought to be the case as opposed to already being the case.

To make a statement of what ought to be true, as opposed to reality.

Eye dialect spelling of should have or should've. / Misconstruction of could have or could've.

plural of should

present participle of should

The cognitive distortion of making statements of what should be true, as opposed to reality.

(double modal / stacked modal, used in some dialects, chiefly Southern US) should perhaps (used to soften "should" and make it less of a command)