$\text{1.}$This building was buil by the local people in the early 19th century.

$\text{2.}$The layout of this university was drawn by the famous French architect.

$\text{3.}$Ho Chi Minh Mausoleum can not be visited on Monday.

$\text{4.}$The Temple of Literature is visited by many foreigners every day.

$\text{5.}$The construction of the first Doctor's stone was ordered by King Le Thanh Long.

$\Rightarrow$ Câu bị động thì Quá Khứ Đơn : S + was/were + Vpp + ( by O ) 

$\Rightarrow$ Câu bị động của modal verb : S + modal verb + be + Vpp + ( by O ) 

$\Rightarrow$ Câu bị động thì Hiện Tại Đơn : S + is/am/are + Vpp + ( by O ) 

$\Rightarrow$ Đối với các chủ ngữ I/we/you/they/he/she/it/someone/somebody/people/... ko dùng by O 

$\Rightarrow$ Các trường hợp dùng by O : by her mother , by Lan , .... 

$\textit{#Yang Heun}$