16. should have + p.p : -Çß¾î¾ß Çߴµ¥
ought to have + p.p
You should have taken my advice.
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You should not have sold the house last year.
You ought to have sent him a letter of thanks.
Before you handed in your papers, you should have read them over and over again.
You ought to have sent the letter by special delivery, You should have taken into account the recent delay in mail delivery.