1, I said : " There are many people in the room now. "

`1.` I said that there were many people in the room then.

`->` Câu tường thuật `-` kể:
S + said (that) + S + V (lùi thì)

`-` Lùi thì: HTĐ `->` QKĐ

`-` ĐTCTG: now `->` then

`1` I said that there were many people in the room then .

`-` Gián tiếp tường thuật : S + said + that + S + V(lùi thì) + O ...

`-` are `->` were .

`-` now `->` then .