`6,`

`->` It is known that he is an excellent tennis player

`->` He is known to be an excellent tennis player

`7,`

`->` It is said that Mark is in hospital

`->` Mark is said to be in hospital

__________________________________________

`@` BĐ - Kép

                 S1 + V1 + that + S2 + V2

`->` It + be + V1-p2 + that + S2 + V2 

`->` S2 + be + V1-p2 + to Vbare-inf ... (nếu V1 và V2 cùng thì)

`->` S2 + be + V1-p2 + to have + P2 ... (nếu V1 và V2 khác thì)

`6,`It is known that he is an excellent tennis player.

- He is known to be an excellent tennis player.

`7,` It is said that Mark is in hospital.

- Mark is said to be in hospital.

- Bị động khách quan : 

- It + is / was + said + that + S + V

=  S + am/is/are + believed + to + Vinf (Nếu vế 1 và vế 2 cùng xảy ra ở một thì)

= S+ was/ were + said + to have + V3 ( Nếu vế 2 xảy ra trước vế 1 )

= S + be + PII + to be + V-ing (Nếu vế 2 chia ở thì HTTD/QKTD)