1 Viet said that he didn't know where An was that day.

2 Susan told me that she was very busy. She would bring me the next day.

3 John told me that If I wanted to learn English, he could help me. 

* Chuyển từ câu trực tiếp sang câu trần thuật thì phải lùi một thì. Thay đổi các trạng từ chỉ nơi chốn, thời gian và đại từ xưng hô cho phù hợp.

"I dont know where An is today" Viet said

`=>` Viet said he didn't know where An was that day.

"Im very busy.I'll ring you tomorrow" Susan said to me

`=>` Susan said she was very busy and she would ring me the next day.

"If you want to learn English, I can help you" John said

`=>` John said if I wanted to learn English, he could help me.