1. 13 is believed to be an unlucky number
2. He is thought to have died for many years
3. John is said to be the biggest student in class
4. She was thought to win the first prize
5. English is known to be an international language
6. He was said to be living in London
7. She is said to have got married
8. She was said to be a famous artist
9. He was said to be jealous of her
10. Oil is said to be under the sea
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Bị động đặc biệt :
- It tobe + said/believed/known/thought....+ S V
- S + tobe + said/believed/known/thought...+ to Vnt/to have VPII