1. Hoa writes a letter for her friend 
=> A letter is written for her friend by Hoa 
2. My mother cooked the dinner last night 
=> The dinner was cooked by mother last night 
3. I am not playing football in the yard
=> Football is not being played in the yard 
câu trực tiếp gián tiếp
1. " Don't open the door, please" he asked me
=> He asked me not to open the door
2. "Do you like watching the film?" She asked me
=> She asked me to like watching the film .