Contoh Kalimat Example :

·         The children should have slept. (modal: should, primary: have; Present Perfect Tense)

·         The book has been read. (primary: has, been;
Passive-Present Perfect Tense)

·         I have been driving for an hour. (primary: have, been; Present Perfect Continuous Tense)

·         I will have been sleeping. (modal: will, primary: have, been; Future Perfect Continuous Tense)