`1.` A statue of Chu Van An is being built by them.

`-` S + am/is/are + being + V3/ed + (by O)

`2.` I am not impressed by Alan's knowledge about science and technology.

`-` S + am/is/are + V3/ed + (by O)

`----------`

`1.`

$\text{Form:}$

`+)` S + am/is/are + being + V(PII) + adv/O (by sb)

`+)` statue of sth/sb: tượng của cái gì/ai

`->` A statue of Chu Van An is being built.

`2.`

$\text{Form:}$

`+)` S + am/is/are (not) + V(PII) + adv/O (by sb)

`+)` knowledge about sth: kiến thức về cái gì

`+)` one's + N

`->` I am not impressed by Alan's knowledge about science and technology.