They say that he was a spy
⇒ It is said that he was a spy
⇒ He is said that to have been a spy
⇒ Cấu trúc : Active : S+ V +( that )+ $ S_2 $ + $ V_2 $ + $ O_2 $
→ Passive : ⇒ It + be + V(p.p) + (that) + $ S_2 $ + $ V_2 $ + $ O_2 $
⇒ $ S_2 $ + be + V(p.p) + to $ V_o $ / to have + P.P ...
Chuk bn hok tốt