• Should and Ought To

• 
• We can also use should/ought to as modals of deduction or speculation when we talk about something we expected to happen in the past.
  

  
  

  subject + should/ought to + have + past participle

  -My new debit card should have arrived by now.  It was sent last month.

  
  

  You can also use should/ought to for criticism about past actions.

  -Sam ought to havestudied harder for his final exam because he failed.

  (Sam is criticized for not studying hard enough.)

• Deductions	The ATM should have printed a receipt because I requested one. The bank ought to have called me back this morning. I left a message yesterday.
  Criticism	Jack has a great credit score. The bank shouldn't* have denied his loan application. The bank teller ought to have counted the money before he gave it to me.

• *Remember! Add not after a modal for the negative form.  Should not is more common than ought not to.

 Source : Alison