Change the voice:
They have built a perfect dam across the river.

Question

Change the voice: 
They have built a perfect dam across the river.

Admin · Accepted Answer

A perfect dam has been built by them across the river.

Admin · Answer

Across the river a perfect dam was built.

Admin · Answer

A perfect dam should have been built by them.

Admin · Answer

Across the river was a perfect dam.

Q. Change the voice:
They have built a perfect dam across the river.