RECOMMENDATION OR MORAL OBLIGATION - SHOULD AND OUGHT TO

The verb should only exists in the simple present, and present perfect forms
  Forms of should

All persons	Present	Present perfect
Affirmative	should	should have
Negatve	should not, shouldn't	should not have,  shouldn't have

The verb ought to only exists in simple present and present perfect forms
  Forms of ought to

All persons	Present	Present perfect
Affirmative	ought to	ought to have
Negative	ought not to,  oughtn't to	ought not to have,  oughtn't to have

Should and ought to are more or less synonymous

Examples:
a1) You should stop smoking ( = You ought to stop smoking.)
a2)  It's raining hard, the children ought to come indoors.
a3)  I didn't know you were married ! You ought to have told me !
a4) If you'd wanted to succeed, you should have worked harder at school.
a5)  This pullover's got holes in it, I should get a new one.
a6)  This pullover's got holes in it, I ought to get a new one.
a7)  That's awful ! You really oughtn't to have done that, you know !