English Grammar - Past tense of 'should' - "I should have", "You shouldn't have", etc.

English Grammar - Past tense of 'should' - "I should have", "You shouldn't have", etc. - YouTube

should have = should've(シュドゥヴ）なんて初めてみた。
should not have = should't have は音のコンバインでシュドゥントヴと発音する。