" I have something to show you", Mary said to Peter. =>Mary told The last time I ate noodles was on Sunday. => I have " I didn't say that last night," Joan said. => Joan denied She has taught the children in this remote village for five months. => She started

$1.$ I told her that I had something to show her.

→ Câu tường thuật dạng câu kể: S + asked/ told sb + that + Mệnh đề lùi thì

Note: said ⇒ said that

said to sb ⇒ told sb that

$2.$ I haven't eaten noodles since Sunday.

→ The last time + S + $VPII$ + was + mốc thời gian/ khoảng thời gian: Lần cuối cùng ai đó làm một việc gì đó. = S + haven't/ hasn't + $VPII$ + O

$3.$ Joan denied saying that the previous night. 

→ Câu tường thuật với deny: Denied + V-ing - Từ chối, phủ nhận điều gì.

Lùi trạng ngữ last + N (night) thành the previous + N/ the N + before

$4.$ She started teaching the children in this remote village five months ago.

→ S + started + V-ing + ... + time + ago.

Start doing smt: bắt đầu làm điều gì đó

" I have something to show you", Mary said to Peter.
`=>` Mary told Peter she had something to show he 

`=>` Câu tường thuật với dạng câu kể : S + told + O + S + V ( lùi thì ) 
The last time I ate noodles was on Sunday.
`=>` I have eaten noodles was on Sunday.

`=>` Khi chuyển thì quá khứ sang thì hiện tại đơn thì bỏ the last time và chia thì hiện tại hoàn thành 
" I didn't say that last night," Joan said.
`=>` Joan denied she hadn't said that the night before

`=>` Câu tường thuật với dạng câu kể : S + told + O + S + V ( lùi thì ) 

last night `->` the night before
She has taught the children in this remote village for five months.
`=>` She started teach the children in this remote village five months ago 

`=>` Khi chuyển từ thì hiện tại hoàn thành sang thì quá khứ đơn thì ta bỏ have/has và có thể thêm started

for `->` ago