should
1. [ verb ] expresses an emotional, practical, or other reason for doing something
Synonyms: ought had_better oughta shouldda
Examples:

: "You had better put on warm clothes" "You should call your mother-in-law" "The State ought to repair the bridges"

2. [ verb ] be expected to
Examples:

: "Parties should be fun"

3. [ verb ] be logically necessary
Synonyms: need ought must
Similar spelling:   shouldda
  shield
  Shoulta