$\text{28. participated }$

$\rightarrow$ QKD 

$\rightarrow$ S+ Ved/V2 

$\rightarrow$ DHNB : Last Saturday 

$\text{29. have written }$

$\rightarrow$ HTHT 

$\rightarrow$ S+ have / has+ V3 

$\rightarrow$ DHNB : so far

$\text{30. carving }$

$\rightarrow$ love + Ving 

$\text{31. was built }$

$\rightarrow$ Bị động QKD 

$\rightarrow$ S+ was/ were + V3 + ( by O )  

28.Last Saturday, Binh participated in raising funds for street children. 

29. We have written hundreds of books so far .

30. And’s father loves carving eggshells

31. The Imperial Academy was built in 1076 under Emperor 

 mh gửi nha