*Công thức

• Khẳng định: S + have/ has + Past participle (V3) + O (She’s started the assinment)
• Phủ định: S + have/ has + NOT+ Past participle + O (I haven’t started the assignment)
• Nghi vấn: have/ has + S + Past participle + O (Have you started the assignment)

*Ví dụ:
1. I’ve done all my homeworks
2, They’ve been married for nearly Fifty years
3. She has lived in Liverpool all her life
4. My last birthday was the worst day I’ve ever had
5. He has written three books and he is working on another book