12. How many bottles has the milkman left? He has left six.
13. I have bought a new carpet. Come and look at it.
14. She has written three poems about her fatherland.
15. We have finished three English courses.
Tất cả câu trên dùng thì HTHT: S+ have/has + $V_{PII/ed}$ +...
Chúc bạn học tốt!