He ..

4. Khoi doesnt know the answer key to this test now.

Khoi wishes..

5. Im sorry Im not able to go with you.

I wish ...

6. What do you think of my flat, Tu Uyen?, Gia Hung said.

Gia Hung asked Tu uyen .

7. Minh Khoi said, Im waiting for my parents now.

Minh Khoi said that

8. Tan Hung asked me, When does your school vacation start?

Tan Hung asked

10. He said to her, My parents are proud of my good marks this year.

He told her that

`4`. Khoi wishes he knew the answer key to this test now.

`5`. I wish I was able to go with you.

`6`. Gia Hung asked Tu Uyen what she thought about his flat.

`7`. Minh Khoi said that he was waiting for his parents then.

`8`. Tan Hung asked me when my school vacation started.

`9`. He told her that his parents were proud of his good marks that year.

`____________________________________________`

`***` Câu ước ở hiện tại:

   S + wish(es) + S + V-ed/c2

`***` Câu tường thuật:

   S + asked + O + wh + S + V(lùi thì)

   S + said + (that) + S + V(lùi thì)

   S + told O + that + S + V(lùi thì) 

4. Khoi doesnt know the answer key to this test now. 

`=>`Khoi wishes he knew the answer key to that test then. 

5. Im sorry Im not able to go with you. 

`=>` I wish I were able to go with you. 

6. What do you think of my flat, Tu Uyen?, Gia Hung said.

`=>` Gia Hung asked Tu Uyen what she thought of the flat.

7. Minh Khoi said, Im waiting for my parents now.

`=>`Minh Khoi said that he were waiting for his parents then.

8. Tan Hung asked me, When does your school vacation start?     

`=>`Tan Hung asked me when my school vacation started.

10. He said to her, My parents are proud of my good marks this year. 

`=>`He told her that his parents were proud of his good marks that year. 

Công thức:

Dạng trần thuật:

S+said(that)$/$told +O+(that)+S+V(quá.khứ)

Dạng câu hỏi:

1.Dạng Wh-questions

S+asked +(O)+Wh-words+S+V(quá.khứ)

2.Dạng Yes$/$No

S+asked+(O)+If$/$whether+S+V(quá.khứ)