1. It has was believed that the Moon was flat.   

2. It was say said that the Moon was made of cheese. 

3. It has be been claimed that flood defences didn't work. 

4. He It was thought that elephants never forget. 

5. It is known like that air travel is safer than travel by road. 

 

Zaawansowane struktury w stronie biernej: Konstrukcja bezosobowa It + strona bierna + czasownik w III formie + that W takiej konstrukcji zwykle wykorzystujemy czasowniki takie jak: believe, expect, know, consider, think  It is believed that this house is haunted.