1 Определить видо-временную форму и залог глагола сказуемого в каждом предложении.

When the street had been widened it could be used for bus and tram traffic.

This offer will be carefully considered by the commission.

A new research is being carried out successfully.

He is listened to with great pleasure.

When the street had been widened it could be used for bus and tram traffic.

- had been widened - past perfect / passive voice

it could be - past simple / active voice

be used - past passive voice

2. will be considered - future simple / passive voice

3. is being carried - present simple / passive voice

4. is listened - present simple / passive voice