The teacher explained the lesson clearly to the students.
They were painting the house when we arrived.
The company has launched a new product.
She will write the report tomorrow.
The engineer is designing a new bridge.
Answers:
The lesson was explained clearly to the students. / Students were explained the lesson clearly.
The house was being painted when we arrived.
A new product has been launched (by the company).
The report will be written tomorrow.
A new bridge is being designed.