1.The Johnsons hired an experienced architect to design their baby's room.

-> The Johnson had their baby's room designed by an experienced architect.

(have something done by someone)

2.The manager will ask a clerk to type this contract for him . 

-> The manager will have this contract typed by a clerk for him.

(have something done by someone)

3.''Julia is blaming me for breaking this laptop," said Jack .

-> Jack said he was being blamed by Julia for breaking the laptop.

(Câu tường thuật)

4.Mike hired a group of construction workers to build his log house .

-> Mike had his log house built by a group of construction workers.

(have something done by someone)

Câu 1,2,3,4 đều chuyển thành câu bị động.

Câu 3 là câu tường thuật nên lùi thì.