English dictionary
should
/S//U/d/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
imperative
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Used as an auxiliary verb, to express a conditional or contingent act or state, or as a supposition of an actual fact; also, to express moral obligation (see <u>Shall</u>); <i>e. g.</i>: they <i>should</i> have come last week; if I <i>should</i> go; I <i>should</i> think you could go.
Source: webster1913